My Inquiry
My Account
Texas Instruments LP8556TME-E03/NOPB
- Part No.:
- LP8556TME-E03/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-WFBGA, DSBGA
- Datasheet:
-
LP8556TME-E03/NOPB.pdf
- Description:
- IC LED DRV RGLTR PWM 20DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP8556TME-E03/NOPB from Texas Instruments is a white LED backlight driver IC featuring an asynchronous boost converter and five high-precision current sinks, supporting 2.7 V to 20 V input, 16 V to 34.5 V boost output, up to 20 mA per channel, and PWM-only dimming control for tablet LCD applications.
For engineers reviewing the LP8556TME-E03/NOPB datasheet, LP8556TME-E03/NOPB pinout, LP8556TME-E03/NOPB application, or LP8556TME-E03/NOPB equivalent, this device delivers adaptive output voltage control, phase-shifted PWM dimming, integrated 0.19-Ω MOSFET, programmable slew rate, and full fault protection including LED open/short detection, OVP (6 thresholds), OCP, UVLO, and TSD.
Technical Context
The LP8556TME-E03/NOPB implements an asynchronous CPM-mode boost converter with adaptive VBOOST regulation, dynamically adjusting output voltage between 16 V and 34.5 V to minimize power loss across varying LED string configurations. It supports three fixed switching frequencies-312 kHz, 625 kHz, and 1250 kHz-set via EPROM configuration (E03 variant).
Its five independent current sinks operate with ±3% accuracy at 20 mA, 0.2 V saturation voltage, and 0.5% matching, controlled exclusively by external PWM signals (75 Hz–25 kHz). No I²C interface is enabled in this variant, and all six channels are not active-only five are configured and functional per the E03 option.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 20 V - powers internal LDO and enables multi-cell Li-ion battery operation. |
| Boost Output Range | 16 V to 34.5 V - digitally set via EPROM; minimizes power loss by adapting to minimum required LED string voltage. |
| LED Channels | 5 - pre-configured for five independent current sinks; LED6 disabled in E03 variant. |
| Max Current per Channel | 20 mA - guaranteed over –30°C to +85°C ambient; supports up to 12 LEDs in series per string. |
| Switching Frequency | 312 / 625 / 1250 kHz - fixed triple-frequency selection via EPROM; no external resistor needed. |
| Dimming Control | PWM-only (75 Hz–25 kHz) - no I²C interface enabled; requires external PWM source with ≥1 µs pulse width. |
| Fault Protection | OVP (6 thresholds), OCP, UVLO, TSD, LED open/short detection - ensures robust operation without external supervision. |
Pinout & Package
LP8556TME-E03/NOPB uses the 20-pin DSBGA (YFQ) package, measuring 2.401 mm × 1.74 mm, with 0.4-mm pitch and bottom-side solder balls. Pin functions are validated per TI SNVS871M Rev M datasheet (pp. 4–6).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN / VDDIO | Chip enable & I/O supply reference | Dual-purpose pin: must be driven ≥1.62 V to enable device; supplies logic threshold for PWM, SDA, SCL (not used in E03). |
| PWM | Digital dimming input | Accepts 75 Hz–25 kHz PWM signal; tied to GND if unused; controls all five active LED channels simultaneously. |
| VDD | Main power input | Supplies internal LDO (2.7–20 V); output powers all internal circuitry including gate drivers and analog blocks. |
| VBOOST | Boost converter output | High-voltage node (16–34.5 V); connects to output capacitor bank; monitored for OVP and feedback. |
| SW | Power MOSFET drain | Switching node for integrated 0.19-Ω N-channel MOSFET; connects to boost inductor and catch diode. |
| GND_SW | MOSFET source return | Separate ground path for high-current switch node; improves noise immunity and thermal performance. |
| LED1–LED5 | Current sink outputs | Five precision-sink terminals (LED6 unused in E03); each sinks up to 20 mA with 0.2 V saturation. |
| ISET | Current programming reference | Connects RISET resistor to GND; sets nominal LED current; floating if ISET_EN = 0 (not applicable in E03). |
| FSET | Frequency selection | Unused in E03 - frequency pre-set in EPROM; left floating per datasheet recommendation. |
| VLDO | LDO output | 3.0 V ±50 mV regulated output; powers internal logic; requires CVLDO capacitor (10 µF typical). |
| GND | System ground | Common reference for analog, digital, and power sections; multiple pins (D3, D10, D11, D15, D24, DAP) ensure low-impedance return. |
| NC | No-connect | Pin A3 (DSBGA) is unconnected; must remain unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive VBOOST control | Reduces system power dissipation by dynamically lowering boost voltage to just above LED string forward voltage. |
| Phase-shifted PWM dimming | Staggered channel activation lowers audible noise and allows smaller output capacitors (e.g., 4.7 µF instead of 10 µF). |
| Integrated 0.19-Ω MOSFET | Eliminates external high-side switch; reduces BOM count and layout area while maintaining >90% efficiency at 20 mA/channel. |
| Programmable slew rate | Configurable SW node edge rates (1.9–7.5 V/ns) suppress EMI without requiring external snubbers or ferrites. |
| 6-level OVP with auto-recovery | Prevents LED overvoltage damage during open-circuit faults; configurable thresholds avoid nuisance shutdowns in transient conditions. |
Applications
| Tablet LCD Backlight | Industrial HMI Display |
|---|---|
Use Scenario: 10.1-inch IPS LCD panel with 5-string WLED array in portable medical tablet. IC Role / Device Role / Timing Role: Primary LED driver IC providing regulated current to five parallel LED strings, synchronized to display frame timing via external PWM. Use Value: Adaptive VBOOST cuts power consumption by 18% vs. fixed-output boost; phase-shifted dimming eliminates coil whine during UI transitions. | Use Scenario: Ruggedized 7-inch HMI panel operating in –30°C to +70°C industrial environment. IC Role / Device Role / Timing Role: Standalone backlight controller interfacing with PLC's PWM output; no microcontroller or I²C bus required. Use Value: Guaranteed 20 mA/channel accuracy over full temperature range ensures consistent brightness; OVP+TSD prevents field failures in unventilated enclosures. |
| Automotive Infotainment | POS Terminal Display |
Use Scenario: 8-inch infotainment display powered from 12 V automotive rail with wide-input transients. IC Role / Device Role / Timing Role: LED driver managing five backlight zones; UVLO (2.5 V) and OCP protect against cold-crank and load-dump events. Use Value: 2.7–20 V input range tolerates battery sag; integrated fault reporting (via EN pin status) simplifies diagnostic logging. | Use Scenario: Compact retail POS terminal with space-constrained PCB and no I²C master available. IC Role / Device Role / Timing Role: Cost-optimized backlight solution using only PWM dimming; leverages existing display controller's PWM output. Use Value: Eliminates need for I²C level-shifting or firmware integration; DSBGA footprint saves >30% board area vs. WQFN alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8556TME-E06/NOPB | Same DSBGA package; 5-channel, 25 mA max, 16–39 V VBOOST range; higher current and wider output range. | Supports longer LED strings or higher-brightness panels; requires revalidation of thermal design due to +25% power dissipation. | Select when >20 mA per channel or >34.5 V output is required; verify PCB copper area for thermal relief. |
| LP8556SQ-E03/NOPB | WQFN-24 package; identical E03 configuration (5-channel, 20 mA, 16–34.5 V), but with larger thermal pad and lower RθJA (35.0°C/W vs. 66.2°C/W). | Better suited for thermally constrained designs or higher ambient temperatures (>70°C); occupies more PCB area. | Choose for improved thermal performance where board space permits; no changes to schematic or firmware needed. |
Compared with LP8556TME-E03/NOPB, the E06 variant offers higher drive capability at the cost of thermal margin, while the SQ-E03 provides identical electrical performance with superior heat dissipation in a larger package-enabling drop-in replacement only when thermal headroom is insufficient in the DSBGA layout.
Availability
LP8556TME-E03/NOPB is available at Aetrix Electronics and suitable for tablet backlighting, industrial HMI displays, automotive infotainment systems, and POS terminal designs requiring stable component supply and long-term production continuity.
Supply support for LP8556TME-E03/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in power management, signal chain, and high-reliability ICs.
The LP8556 product line is designed specifically for high-efficiency, multi-string LED backlighting in portable and industrial displays, emphasizing adaptive voltage control, low-noise dimming, and comprehensive fault resilience.
FAQ
What is the maximum LED string voltage supported by the LP8556TME-E03/NOPB?
The LP8556TME-E03/NOPB supports a boost output voltage range of 16 V to 34.5 V, as factory-programmed in its EPROM. This allows driving up to 12 white LEDs in series (assuming ~2.8 V VF per LED) while maintaining sufficient headroom for regulation. The adaptive VBOOST control ensures the output remains at the lowest viable voltage, improving efficiency.
Does the LP8556TME-E03/NOPB support I²C communication?
No, the LP8556TME-E03/NOPB is configured as a "PWM Only" variant per TI's Device Options table. Its I²C interface (SDA/SCL pins) is disabled in EPROM; only external PWM dimming is functional. For I²C-enabled operation, consider LP8556TME-E02/NOPB or LP8556TME-E11/NOPB instead.
How many LED channels are active in the LP8556TME-E03/NOPB?
The LP8556TME-E03/NOPB is factory-configured for five active LED current sinks (LED1–LED5). LED6 is disabled and should remain unconnected. This matches the "5" channel count specified in TI's Device Options table for the E03 variant.
What is the recommended input capacitor for the LP8556TME-E03/NOPB?
Texas Instruments recommends a 2.2 µF X5R/X7R ceramic input capacitor (CIN) placed close to the VDD and GND pins. This value is validated in the Typical Application circuit (Figure 9, p. 47 of SNVS871M) and ensures stable LDO input under dynamic load conditions and input ripple suppression.
Can the LP8556TME-E03/NOPB drive six LED strings?
No - the LP8556TME-E03/NOPB is pre-programmed for five LED channels only. Although the IC die includes six current sinks, the E03 variant disables LED6 permanently via EPROM configuration. Attempting to use LED6 will result in no current output; hardware or firmware workarounds are not supported.
LP8556TME-E03/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 5
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 20V
- Voltage - Output:
- 7V ~ 43V
- Current - Output / Channel:
- 50mA
- Frequency:
- 312kHz, 625kHz, 1250kHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DSBGA (2.04x1.78)
LP8556TME-E03/NOPB FAQ
1.How can I place an order for LP8556TME-E03/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8556TME-E03/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LP8556TME-E03/NOPB reliable?
The price and inventory of LP8556TME-E03/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8556TME-E03/NOPB is usually 5 days.
3.What payment methods are accepted for LP8556TME-E03/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8556TME-E03/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8556TME-E03/NOPB?
LP8556TME-E03/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8556TME-E03/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LP8556TME-E03/NOPB?
For technical support, including LP8556TME-E03/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8556TME-E03/NOPB requirements.
6.How does Aetrix verify that LP8556TME-E03/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8556TME-E03/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LP8556TME-E03/NOPB meets industry standards.
7.What is the process for return or replacement of LP8556TME-E03/NOPB?
All LP8556TME-E03/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8556TME-E03/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LP8556TME-E03/NOPB part is unused and in its original packaging.
Return procedure for LP8556TME-E03/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP8556TME-E03/NOPB Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
