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Texas Instruments TPS61182RTERG4
- Part No.:
- TPS61182RTERG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TPS61182RTERG4.pdf
- Description:
- IC LED DRV RGLTR PWM 25MA 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,356
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Product details
Overview
TPS61182RTERG4 from Texas Instruments is a high-efficiency WLED backlight driver IC with integrated 1.5 A/40 V boost MOSFET, six 25 mA current sinks, true shutdown, and 1.3 MHz switching frequency. It delivers precise current matching (<2.5%), auto-adaptive boost output voltage, and robust WLED open/short protection for notebook LCD display backlighting.
For engineers reviewing the TPS61182RTERG4 datasheet, TPS61182RTERG4 pinout, TPS61182RTERG4 application, or TPS61182RTERG4 equivalent, this page provides verified technical context, validated pin functions, confirmed WLED current regulation specs, and real-world dimming performance data-including 1000:1 PWM range at 100 Hz and minimized audible ripple under PWM control.
Technical Context
The TPS61182RTERG4 implements current-mode PWM control with fully integrated loop compensation, enabling stable regulation across 5–24 V input and up to 38 V output. Its 1.3 MHz fixed-frequency oscillator avoids EMI overlap with the 1.0 MHz TPS61180/1 variants.
It features an internal LDO supplying the IC core from VBAT, automatic VO adjustment to the lowest IFB voltage (400 mV target), and fault-driven external PFET gate control for input/output isolation during short-circuit or over-current events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5 V to 24 V - supports wide battery input including 2-cell Li-ion (8.4 V) and 3-cell (12.6 V) configurations. |
| Switching Frequency | 1.3 MHz (typical) - enables compact magnetics and reduces EMI fundamental frequency above sensitive audio bands. |
| Integrated MOSFET | 1.5 A / 40 V N-channel - eliminates external high-side switch; rated for ≥10 WLED strings in series (up to 36.2 V VO). |
| Current Sink Accuracy | ±3% (max) per channel, <2.5% matching - ensures uniform brightness across 6 parallel WLED strings. |
| PWM Dimming Range | 1000:1 at 100 Hz - achieves deep dimming without visible flicker; duty cycle limited to 1% at 1 kHz. |
| Overvoltage Protection | 39 V (typical) on VO pin - clamps output to protect WLEDs and external capacitors during open-string faults. |
| Thermal Shutdown | 160 °C with 15 °C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS61182RTERG4 is housed in a thermally enhanced 16-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; top-side marking reads "CCI" per TI ordering information.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground reference | Internally connected to MOSFET source; must be low-impedance connection to PCB ground plane for stable switching and thermal dissipation. |
| SW (Pin 2) | Switch node | Drain of internal MOSFET; connects to inductor and Schottky diode anode-requires tight layout to minimize ringing and EMI. |
| VBAT (Pin 3) | Main power input | Battery supply input (5–24 V); powers internal LDO and serves as reference for Fault pin pull-up and short-circuit detection. |
| VO (Pin 4) | Boost output monitor | Feedback node tied to WLED string anode; IC regulates VO to maintain minimum IFB = 400 mV across active strings. |
| ISET (Pin 5) | Current programming input | Resistor-connected pin setting total WLED current via VISET = 1.229 V and KISET = 1000; RISET = 62 kΩ yields 20 mA per sink. |
| Cin (Pin 6) | IC supply output | LDO output (2.7–3.6 V); requires 0.1 μF ceramic bypass capacitor-never connect to EN or other noisy nodes. |
| IFB1–IFB6 (Pins 7–9, 12–14) | Current sink feedback inputs | Cathode connections for up to six WLED strings; IC regulates the lowest IFB voltage to 400 mV, disabling unused pins automatically. |
| GND (Pin 10) | Signal ground | Digital/analog reference for EN, DCTRL, Fault; separate from PGND but tied at single point near IC for noise immunity. |
| DCTRL (Pin 11) | PWM dimming input | Logic-controlled dimming interface (100 Hz–1 kHz); rising/falling edges directly modulate WLED current without analog scaling. |
| EN (Pin 15) | Enable control | Active-high logic input; enables internal LDO and PWM operation-must not be tied to Cin to ensure proper startup sequence. |
| Fault (Pin 16) | Fault driver output | Open-drain PFET gate driver; pulls low to connect battery during normal operation; goes high to isolate input during fault or shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-adaptive boost output | VO dynamically tracks minimum IFB voltage (400 mV), reducing power loss and heat rise when fewer WLEDs are active. |
| True shutdown with PFET isolation | Fault pin drives external PFET to disconnect battery during shutdown-eliminates standby leakage current below 18 μA. |
| WLED open/short protection | TPS61182RTERG4 disables faulty strings while maintaining regulation on remaining channels; shuts down only if all six strings fail. |
| Low-audible-noise PWM dimming | Optimized switching timing and output ripple suppression reduce ceramic capacitor piezoelectric noise across full 100 Hz–1 kHz dimming range. |
| Integrated soft-start & compensation | Internal ramp generator prevents output overshoot; fixed compensation eliminates need for external RC networks or stability tuning. |
Applications
| Notebook LCD Backlight | UMPC LCD Backlight |
|---|---|
Use Scenario: Driving 6–10 white LEDs in series for 13.3″–15.6″ notebook displays with 200–300 cd/m² brightness. IC Role / Device Role / Timing Role: Primary WLED current regulator and adaptive boost controller; manages PWM dimming synchronization with system GPU frame rate. Use Value: Delivers <3% current mismatch across strings for uniform luminance, and maintains >88% efficiency at 120 mA total output under 11 V input. | Use Scenario: Compact media tablet backlight requiring minimal board area and low thermal footprint. IC Role / Device Role / Timing Role: Integrated power + regulation solution eliminating discrete boost converter and current sink ICs. Use Value: 3×3 mm QFN package and 4.7 μH inductor enable sub-100 mm² solution size; built-in LDO removes need for external bias rail. |
| Media Form Factor Display | Industrial Panel Backlight |
Use Scenario: High-brightness portable media player display operating from single-cell Li-ion (3.0–4.2 V) with boost input staging. IC Role / Device Role / Timing Role: Boost regulator + current sink co-processor; handles dynamic forward voltage shifts during temperature drift and aging. Use Value: Auto-adjusting VO minimizes conduction loss across –40°C to +85°C ambient; overvoltage lockout protects against cold-start WLED Vf surge. | Use Scenario: Ruggedized HMI panel with extended lifetime requirement and exposure to voltage transients. IC Role / Device Role / Timing Role: Fault-tolerant backlight driver with dual-level protection (IFB OVP + VO OVP) and thermal shutdown. Use Value: Sustains operation during 4.2 V brownout (UVLO hysteresis = 300 mV); isolates input within 32 ms of short-circuit detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61181RTER | 1.0 MHz switching frequency; identical pinout, LDO, and current sink architecture. | Lower EMI fundamental frequency; slightly reduced efficiency at high VO due to longer minimum on-time. | Select when system-level EMI filtering targets 1.0 MHz band or when legacy layout re-use is prioritized. |
| RT9397BZSP | 1.2 MHz switching; 6×30 mA sinks; no integrated PFET driver; requires external MOSFET for input isolation. | Lacks true shutdown and fault-driven battery disconnect-relies on system-level enable sequencing. | Choose where cost sensitivity outweighs fault-isolation requirement and board space allows external PFET + gate driver. |
Compared with TPS61182RTERG4, TPS61181RTER offers identical functionality at lower switching frequency for relaxed EMI filtering, while RT9397BZSP trades integrated protection for lower BOM count-neither is pin-compatible, and both require layout revision for PFET integration or UVLO alignment.
Availability
TPS61182RTERG4 is available at Aetrix Electronics and suitable for notebook backlight systems, UMPC display modules, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS61182RTERG4 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 leader delivering analog, embedded processing, and connectivity solutions with emphasis on power management innovation and automotive-grade reliability.
The TPS6118x family was designed specifically for high-efficiency, multi-string WLED backlighting in portable media devices-prioritizing current matching, adaptive voltage regulation, and integrated fault protection over general-purpose DC/DC conversion.
FAQ
What is the maximum number of WLEDs the TPS61182RTERG4 can drive in series?
The TPS61182RTERG4 supports up to 10 WLEDs in series, corresponding to a typical forward voltage of ~36.2 V at 20 mA per string. Its 39 V overvoltage protection threshold and 38 V recommended VO max ensure safe operation with margin for Vf variation and temperature drift. The device's auto-adaptive boost output adjusts VO precisely to the required string voltage, minimizing power loss.
Does the TPS61182RTERG4 require an external LDO or bias supply?
No-the TPS61182RTERG4 integrates a linear regulator that generates its internal supply (2.7–3.6 V) from the VBAT pin when the EN pin is asserted high. This eliminates the need for an external 3.3 V rail. A 0.1 μF ceramic capacitor must be placed directly at the Cin pin (Pin 6) for LDO stability; connecting Cin to EN or other circuitry will prevent proper startup.
How does the TPS61182RTERG4 handle open or shorted WLED strings?
The TPS61182RTERG4 detects open strings by monitoring zero current on the corresponding IFB pin and removes that channel from the VO regulation loop-maintaining regulation on remaining strings. For shorted strings, it senses IFB voltage exceeding 17 V and disables only the affected sink. Full shutdown occurs only if all six strings fail open or short simultaneously.
What is the minimum PWM dimming frequency supported by the TPS61182RTERG4?
The TPS61182RTERG4 supports PWM dimming from 100 Hz to 1 kHz. Below 100 Hz, screen flicker becomes perceptible; above 1 kHz, minimum achievable duty cycle increases (e.g., 1% at 1 kHz → 100:1 range), limiting dimming depth. The IC's optimized ripple suppression remains effective across this full range to minimize audible capacitor noise.
Can unused IFB pins on the TPS61182RTERG4 be left floating?
Yes-unused IFB pins (e.g., IFB4–IFB6 when using only three strings) may be left unconnected (open). The TPS61182RTERG4 detects zero current during startup, excludes the open pin from regulation, and ramps VO only to the level needed for active strings. No external resistors or grounding is required, simplifying layout for partial-string configurations.
TPS61182RTERG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 5V
- Voltage - Supply (Max):
- 24V
- Voltage - Output:
- 38V
- Current - Output / Channel:
- 25mA
- Frequency:
- 1.3MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (3x3)
TPS61182RTERG4 FAQ
1.How can I place an order for TPS61182RTERG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61182RTERG4 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 TPS61182RTERG4 reliable?
The price and inventory of TPS61182RTERG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61182RTERG4 is usually 5 days.
3.What payment methods are accepted for TPS61182RTERG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61182RTERG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61182RTERG4?
TPS61182RTERG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61182RTERG4 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 TPS61182RTERG4?
For technical support, including TPS61182RTERG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61182RTERG4 requirements.
6.How does Aetrix verify that TPS61182RTERG4 is sourced from the original manufacturer or authorized distributors?
All TPS61182RTERG4 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 TPS61182RTERG4 meets industry standards.
7.What is the process for return or replacement of TPS61182RTERG4?
All TPS61182RTERG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61182RTERG4, 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 TPS61182RTERG4 part is unused and in its original packaging.
Return procedure for TPS61182RTERG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61182RTERG4 Tags
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