TLC6C5712QPWPRQ1 - 12-Ch AEC-Q100 LED Driver | Texas Instruments
MPN： TLC6C5712QPWPRQ1 ✓ 啟用中TLC6C5712QPWPRQ1 概覽
A constant-current-sink LED driver is a type of linear LED driver IC that regulates the current flowing through each LED string by sinking a precisely controlled current to ground. Within the power-management hierarchy, it sits under LED drivers -> linear current regulators -> power management ICs. Unlike simple resistive ballast or open-drain switches, a constant-current sink holds LED brightness constant despite forward-voltage variation, supply drift, and temperature change, which is essential for color and brightness consistency.
Key features include 12 independent current-sink outputs rated at 75 mA each, PWM-based dimming for precise brightness control, and a comprehensive diagnostic suite that detects open-circuit, short-circuit, and other fault scenarios. TI designed this device specifically for safety-critical automotive cluster lighting, where system-level functional-safety considerations demand per-channel fault detection to maintain brightness and color-temperature consistency across many LEDs.
Technically, the device uses a 12-bit architecture with internal current-setting registers and serial control, allowing the microcontroller to program per-channel current and read back diagnostic status. The current-sink topology is linear, adding no switching noise to the LED rails, while PWM dimming achieves wide-range average brightness without color shift. Output voltage rating of 7 V provides headroom for LED stack variation.
Typical applications include automotive instrument-cluster backlighting, indicator and telltale LEDs, and other safety-critical multi-channel LED lighting in vehicles. The 12-channel density reduces BOM count versus discrete transistor solutions while adding diagnostics unavailable in discrete designs.
A key design consideration is thermal dissipation: at 75 mA per channel with a large LED-headroom voltage, package power dissipation must be checked against the HTSSOP PowerPAD thermal capability, using copper pour under the pad.
This page adds value beyond the datasheet by synthesizing distributor pricing, availability, drop-in alternative analysis, and practical design notes in one place.
直接替換替代品，適用於 TLC6C5712QPWPRQ1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TLC6C5712QPWPRQ1 （相同外形與佔位） — 差異在於 Diagnostics, Dimming Method, Package.
TLC6C5748QPWPRQ1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TLC6C5712QPWPRQ1 最大額定值與電氣特性
| 通道數 | 12 |
| Output Current per Channel | 75 mA |
| Supply Voltage Range | 3 V to 5.5 V |
| Output Voltage Rating | 7 V |
| Dimming Method | PWM |
| 拓撲 | Linear, constant-current sink |
| Diagnostics | Open/short-circuit fault detection |
| Automotive Qualification | AEC-Q100 qualified |
| 工作溫度範圍 | -40C to +125C |
| 封裝 | 28-pin HTSSOP (PWP) with PowerPAD |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel |
| Part Status | Active |
| Series | Automotive, AEC-Q100 |
| Application | Automotive cluster and safety-critical LED lighting |
TLC6C5712QPWPRQ1 28-pin htssop (pwp) with powerpad 腳位配置指南
TLC6C5712QPWPRQ1（28-pin htssop (pwp) with powerpad 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： TLC6C5712QPWPRQ1.
請參閱 資料表 以查看完整腳位配置。
典型應用
TLC6C5712QPWPRQ1 適用於 6 應用s: Automotive Instrument Cluster Backlighting, Telltale and Indicator LED Lighting, Ambient Interior Lighting, Status and Fault Indicator Panels in Industrial Equipment, Segment and Button Backlighting in HMI Panels, Led Bar Graph and Bargraph Display Drivers.
Automotive Instrument Cluster Backlighting
The TLC6C5712QPWPRQ1 fits automotive cluster backlighting because TI designed it specifically to keep LED brightness and color temperature consistent across many channels, a demand TI explicitly cites on the product page. Each of the 12 channels regulates up to 75 mA of constant sink current, so LED forward-voltage spread does not create visible brightness mismatch between pointers, dials, and backlight zones. PWM dimming enables smooth day/night brightness transitions without color shift, because average current is modulated while the peak current stays regulated. The full diagnostic suite detects open and short circuits per channel and reports them over the serial interface, which cluster modules require for telltale safety monitoring. A microcontroller programs per-channel current through the 3 V to 5.5 V compatible serial interface and reads back fault status, replacing a dozen discrete current-setting circuits with one AEC-Q100 qualified IC.
推薦
Telltale and Indicator LED Lighting
Telltale indicators such as brake, turn-signal, and warning lamps are safety-critical and must report their own failure, which is exactly what the TLC6C5712QPWPRQ1 diagnostics provide. Each channel's open-circuit and short-circuit detection flags a dead or shorted LED string over the serial interface, allowing the cluster controller to illuminate a master warning. The 75 mA per channel rating covers typical high-brightness indicator LEDs, and the 7 V output voltage rating tolerates indicator strings with multiple series LEDs above the 3.3 V or 5 V logic rail. Because the current sinks are linear, there is no switching noise injected into the vehicle's shared harness or into nearby radio circuits, simplifying EMC design in the cluster. AEC-Q100 qualification at -40C to +125C matches under-hood-adjacent and direct-sunlight dashboard thermal environments.
推薦
Ambient Interior Lighting
Multi-zone interior ambient lighting benefits from the TLC6C5712QPWPRQ1's combination of 12 PWM-dimmed constant-current channels and per-channel programmable current. Designers assign channels to door, footwell, and dashboard light bars and balance each zone's brightness in firmware, achieving uniform appearance despite LED binning spread, because the closed-loop current sink removes forward-voltage dependence. PWM dimming spans from full brightness down to deep dim levels for night driving without the color shift that analog dimming causes in white LEDs. The full diagnostics detect a broken light bar in a door harness, and the fault status readback lets the body controller log the failure. The 3 V to 5.5 V supply range connects directly to typical body-controller 5 V rails, and the 28-pin HTSSOP PowerPAD package thermally handles moderate multi-channel loads on a standard two-layer cluster PCB with copper pour.
推薦
Status and Fault Indicator Panels in Industrial Equipment
Industrial control panels and machine status towers use dozens of indicator LEDs whose failures must be visible and reportable. The TLC6C5712QPWPRQ1 consolidates 12 channels of 75 mA constant-current drive in one IC, with open and short diagnostics that the PLC can read over the serial bus to flag a burned-out lamp before an operator notices. PWM dimming lets the same panel adapt LED brightness between bright factory-floor daylight and dim control-room conditions. Although the part is AEC-Q100 automotive qualified, its -40C to +125C range and robust diagnostics make it equally at home in industrial cabinets. The linear sink topology produces no EMI, simplifying conformity testing in electrically noisy panel environments, and the 7 V output rating allows multi-LED series stacks above the 5 V logic supply within the headroom limit.
推薦
Segment and Button Backlighting in HMI Panels
Human-machine interface panels with backlit buttons and segmented indicators need many independently dimmable LED channels in minimal board area, and the TLC6C5712QPWPRQ1 provides 12 such channels in a single 28-pin HTSSOP. Each channel's 75 mA capability drives high-brightness backlight LEDs, while the constant-current regulation ensures identical backlight intensity across buttons despite LED manufacturing spread. The serial interface is compatible with 3.3 V and 5 V host controllers within the 3 V to 5.5 V supply range, and per-channel PWM dimming supports touch-activated brightness ramps without additional external components. When a backlight LED opens or shorts, the diagnostics report the exact channel, enabling predictive maintenance messaging on the HMI instead of silent failure. The PowerPAD package dissipates multi-watt combined loads when properly soldered to a ground pour on the panel PCB.
推薦
Led Bar Graph and Bargraph Display Drivers
Bar-graph level indicators, such as audio VU meters, tank-level displays, and diagnostic bar displays, map naturally onto the TLC6C5712QPWPRQ1's 12 channels. Each channel holds its LED segment at a precisely regulated current up to 75 mA, so every segment in the bar shows uniform intensity regardless of forward-voltage differences between green, yellow, and red die in multi-color bargraphs. PWM dimming allows the host to scale the display brightness to ambient light, and the per-channel diagnostics can flag a segment failure so the system can display a fault code instead of an incorrect level reading. The 7 V output voltage rating supports bargraph modules with internal series resistors or longer strings above the 5 V rail, and the 3 V to 5.5 V supply range interfaces directly with common microcontroller development ecosystems at 3.3 V or 5 V logic.
推薦
推薦產品摘要
工程參考資料，適用於 TLC6C5712QPWPRQ1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TLC6C5748QPWPRQ1 |
|---|---|---|
| Package | 28-pin HTSSOP (PWP) | 28-pin HTSSOP (PWP) - same |
| Brand | Texas Instruments | Texas Instruments |
| Output Channels | 12 | 16 |
| PWM Dimming | Yes | Yes |
| Per-Channel Diagnostics | Yes (open/short detection) | Yes |
| AEC-Q100 Qualification | Qualified (-40C to +125C) | Qualified |
主要差異化特點
- Full per-channel fault diagnostics designed for functional safety (對比STP16CPC26)
- Higher channel density in one package vs 8-channel alternatives (對比CAT4008)
- Trade-off: linear topology dissipates headroom power (對比TLC6C5748QPWPRQ1)
設計說明
Estimated: the TLC6C5712QPWPRQ1 is a linear current-sink driver, so each channel dissipates (V_out_headroom x I_ch). For example, 12 channels at 75 mA with 2 V of headroom at the sinks dissipates 12 x 2 V x 0.075 A = 1.8 W in the package. The HTSSOP (PWP) PowerPAD must be soldered to a copper pour; consult the 68-page TI datasheet thermal table for theta_JA of the PWP package and verify junction temperature stays below 125C at the worst-case automotive ambient. Reduce per-channel current via registers or lower LED headroom to cut dissipation.
Place a 0.1 uF ceramic decoupling capacitor directly at the VCC pin with a solid via to ground. Connect the exposed PowerPAD to the PCB ground plane with an array of thermal vias - this pad is both the thermal and part of the electrical path and is not optional. Route LED string power traces wide enough for the summed channel currents, and keep the serial interface traces short and away from LED current loops to avoid corrupting the diagnostic readback during PWM transitions.
Do not exceed the 7 V rating at the current-sink output pins: LED strings whose total forward voltage is far below the rail force the sinks to absorb the excess, increasing power dissipation and risking the output voltage limit. Configure per-channel current registers before enabling outputs to avoid initial current overshoot. Also note the supply range is 3 V to 5.5 V - do not connect the logic supply to 12 V automotive battery rails without an intermediate regulator or protection.
合規資訊
AEC-Q100 qualified per TI product page and abc-semi series data (Automotive, AEC-Q100). RoHS/REACH status not stated in the provided verified data - check the TI product page quality section.
