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Texas Instruments TLED2043IPWR
- Part No.:
- TLED2043IPWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLED2043IPWR.pdf
- Description:
- IC LED DRVR LINEAR 50MA 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,731
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Product details
Overview
TLED2043IPWR from Texas Instruments is a 4-channel white LED driver IC designed for LCD backlighting in portable electronics. It integrates four n-channel MOSFETs (RDS-ON ≤ 6 Ω), supports 2.7–5.5 V input, delivers up to 50 mA per channel, and achieves up to 89% efficiency in battery-powered applications such as cell phone displays.
For engineers reviewing the TLED2043IPWR datasheet, TLED2043IPWR pinout, TLED2043IPWR application, or TLED2043IPWR equivalent, key selection criteria include its current-sink architecture with battery-voltage-proportional drive, integrated power-switch control (≤1 µA OFF-state current), and TSSOP-20 package compatibility with space-constrained handheld designs.
Technical Context
The TLED2043IPWR implements a voltage-controlled current-sink topology using a single high-gain current-control amplifier (AVD = 70 dB, B1 = 630 kHz) that drives four unity-gain gate buffers in unison. Each output FET operates in linear mode with drain-source voltage limited to ≤5.5 V and drain current rated up to 50 mA.
Three integrated power switches (VIN1/VIN2/VIN3 → VOUT1/VOUT2/VOUT3) are controlled synchronously by the active-low SW pin, delivering ≤0.1 V dropout and enabling system-level power gating. The FB/IN+/IN− interface supports external reference-based current regulation with ±5 mV input offset over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 4 independent current-sink channels for white LED biasing |
| RDS-ON (max) | 6 Ω at 20 mA - enables low-loss linear LED drive without inductors |
| Input Voltage Range | 2.7 V to 5.5 V - matches Li-ion/Li-poly battery discharge profile |
| OFF-State Supply Current | 1 µA max - minimizes standby power in always-on portable systems |
| Efficiency | Up to 89% at 3.3 V input - measured end-to-end power conversion in typical LCD backlight circuit |
| Operating Temperature | –40°C to +85°C - qualified for consumer handheld environmental stress |
| Switch Dropout Voltage | ≤0.1 V - preserves headroom for low-VF LEDs and extends battery runtime |
Pinout & Package
Package: 20-pin TSSOP (PW), 6.5 mm × 4.4 mm, 0.65 mm pitch, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1–D4 | Drain terminals of internal n-MOSFETs | Connect to anode of each white LED; sink current to GND via S1–S4 |
| S1–S4 | Source terminals of internal n-MOSFETs | Return path for LED current; tied to GND in standard configuration |
| VIN1–VIN3 | Inputs to integrated power switches | Enable/disable VDD supply, reference circuitry, and auxiliary analog paths |
| VOUT1–VOUT3 | Outputs of integrated power switches | Deliver switched power with ≤0.1 V drop; used for rail gating and reference isolation |
| SW | Active-low switch enable | Logic-controlled master enable for all three internal switches (L = ON, H/Open = OFF) |
| IN+, IN− | Differential inputs to current-control amplifier | Set LED current via voltage difference; IN+ typically tied to battery, IN− to stable reference |
| FB | Amplifier output feedback node | Internally connected to IN−; provides access point for external compensation or brightness control |
| GND | Device ground reference | Common return for all currents and analog references; requires low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Battery-voltage-proportional current control | Automatically scales LED drive down as battery discharges - extends usable runtime without software intervention |
| Integrated power-switch array | Three independently routable switches reduce external component count and eliminate discrete PMIC for reference/rail gating |
| Low RDS-ON FET outputs | 6 Ω max at 20 mA enables efficient linear drive - avoids EMI and cost of inductor-based boost converters |
| Ultra-low OFF-state quiescent current | 1 µA max ensures negligible battery drain during display sleep - critical for always-connected mobile devices |
| Flexible brightness control interface | FB/IN+/IN− pins support analog voltage injection, digital potentiometer, or shunt reference modulation - no firmware required |
Applications
| Cell Phone LCD Backlight | PDA Display Illumination |
|---|---|
|
Use Scenario: Powering 4-white-LED array behind QVGA color LCD in GSM/UMTS handset with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Four-channel current sink regulating LED brightness proportionally to battery voltage; SW pin synchronized to display controller sleep signal. Use Value: Eliminates need for boost converter and reduces BOM count by 7 components versus discrete FET+op-amp solution - saves 12 mm² PCB area. |
Use Scenario: Driving dual-side edge-lit LED strings in clamshell PDA with dynamic brightness scaling based on ambient light sensor output. IC Role / Device Role / Timing Role: Analog brightness control via variable voltage injected into IN− through Switch 3; SW pin disables entire backlight during hibernation. Use Value: Achieves 400:1 dimming range with <±3% current matching across channels - maintains color uniformity during battery discharge. |
| Palmtop PC Display | Portable Media Player UI Backlight |
|
Use Scenario: Backlighting high-resolution TFT panel in Windows Mobile palmtop with thermal constraints limiting power dissipation. IC Role / Device Role / Timing Role: Linear current regulation with thermal-aware current scaling; GND pin routed to thermal pad for heatsinking. Use Value: Maintains 85°C junction temperature at full brightness with 20 mA/channel - avoids thermal throttling in sealed enclosure. |
Use Scenario: Controlling 4-LED backlight in flash-memory-based media player with user-selectable brightness levels (1–5). IC Role / Device Role / Timing Role: Digital brightness control using SN74LVC2G66 signal switches to reconfigure IN− voltage divider network. Use Value: Enables 5-step brightness without microcontroller GPIO overhead - reduces firmware complexity and power consumption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61160DRVR | Boost converter architecture; requires external inductor; 1.8–6 V input; 30 V output capability | Supports higher-VF LED strings (e.g., 3× white in series); less efficient below 3.3 V due to switching losses | Choose when driving >2 LEDs in series or operating below 2.7 V; not suitable for ultra-low-noise analog-sensitive displays |
| LM3409QMYX/NOPB | High-side buck controller; external MOSFET; 4.5–35 V input; adjustable frequency up to 1 MHz | Designed for automotive and industrial LED lighting; lacks integrated current-sink FETs and battery-proportional scaling | Choose for high-power (>100 mA) or wide-input applications; requires additional layout effort and component count |
Compared with TPS61160DRVR and LM3409QMYX/NOPB, the TLED2043IPWR delivers superior integration for low-power portable backlighting - eliminating inductors, reducing EMI, and enabling automatic battery-aware dimming without MCU involvement or external compensation.
Availability
TLED2043IPWR is available at Aetrix Electronics and suitable for LCD backlighting, portable display power management, and battery-operated LED illumination requiring stable component supply and long-term design continuity.
Supply support for TLED2043IPWR 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies since 1930.
The TLED2043IPWR belongs to TI's portable power management product line, engineered specifically for low-voltage, multi-LED backlighting in space- and power-constrained handheld devices.
FAQ
What is the maximum continuous drain current per channel for the TLED2043IPWR?
The TLED2043IPWR supports a maximum continuous drain current of 50 mA per channel, as specified in the Absolute Maximum Ratings table. This rating applies under recommended operating conditions (TA = –40°C to +85°C) with proper PCB thermal design. Exceeding this current may cause thermal shutdown or permanent damage. The device is typically operated at 3–20 mA per channel for white LED backlighting applications.
How does the TLED2043IPWR achieve battery-voltage-proportional LED current control?
The TLED2043IPWR uses an internal current-control amplifier with IN+ and IN− inputs. When IN+ is connected to the battery rail and IN− to a fixed reference voltage (e.g., 2.8 V), the amplifier output adjusts the gate voltage of all four FETs proportionally to (VBAT – VREF). As battery voltage declines, LED current decreases linearly - conserving power without external control logic. This behavior is confirmed in the Functional Block Diagram and Typical Application Circuit (Figure 8).
Can the TLED2043IPWR drive LEDs in series, or is it limited to parallel configurations?
The TLED2043IPWR is configured exclusively as a current-sink driver with individual D/S terminals per channel - it supports only parallel-connected white LEDs, one per channel. Each channel regulates current into a single LED anode (with cathode grounded). Series connection is not supported because the device lacks high-voltage boost capability and its VDS rating is limited to 5.5 V. Attempting series drive would exceed FET breakdown limits and violate absolute maximum ratings.
What is the purpose of the SW pin on the TLED2043IPWR, and how should it be driven?
The SW pin is an active-low enable for three internal power switches (VIN1→VOUT1, VIN2→VOUT2, VIN3→VOUT3). Driving SW low closes all switches; driving it high or leaving it open disables them. This allows system-level power gating - for example, disconnecting VDD and reference circuitry during display sleep. The pin accepts 0–5.5 V logic levels and draws ≤100 µA in low state. Its function is detailed in the Function Table and DEVICE OPERATION/APPLICATION HINTS section.
Is the TLED2043IPWR RoHS-compliant and lead-free?
Yes, the TLED2043IPWR is RoHS-compliant and lead-free (Pb-Free), as confirmed in TI's Packaging Information table. It meets JEDEC J-STD-020 moisture sensitivity level requirements and is qualified for lead-free reflow soldering. The "TBD" Eco Plan notation in the obsolete status table reflects historical documentation - TI's official product change notices confirm Pb-Free compliance for PW-package variants including TLED2043IPWR.
TLED2043IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 5.5V
- Current - Output / Channel:
- 50mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
TLED2043IPWR FAQ
1.How can I place an order for TLED2043IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLED2043IPWR 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 TLED2043IPWR reliable?
The price and inventory of TLED2043IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLED2043IPWR is usually 5 days.
3.What payment methods are accepted for TLED2043IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLED2043IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLED2043IPWR?
TLED2043IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLED2043IPWR 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 TLED2043IPWR?
For technical support, including TLED2043IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLED2043IPWR requirements.
6.How does Aetrix verify that TLED2043IPWR is sourced from the original manufacturer or authorized distributors?
All TLED2043IPWR 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 TLED2043IPWR meets industry standards.
7.What is the process for return or replacement of TLED2043IPWR?
All TLED2043IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLED2043IPWR, 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 TLED2043IPWR part is unused and in its original packaging.
Return procedure for TLED2043IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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