TLD5191ESXUMA1 - 55V H-Bridge LED DC-DC Controller | Infineon
MPN： TLD5191ESXUMA1 ✓ 啟用中TLD5191ESXUMA1 概覽
A LITIX Power LED driver is a high-side or H-bridge controller that regulates current through high-brightness LEDs by modulating an external MOSFET stage. Such controllers belong to the broader family of switched-mode LED drivers that sit hierarchically between DC-DC converters and lighting power management ICs. They translate an intermediate bus voltage into a tightly regulated LED string current with high efficiency, replacing linear regulators where thermal dissipation or input voltage headroom would otherwise be unacceptable.
The TLD5191ESXUMA1 features an integrated H-Bridge topology that supports both buck and boost operation from a single device, enabling LED string voltages above or below the input rail. Programmable switching frequency from 200 kHz to 700 kHz lets designers balance efficiency against EMI and inductor size. Built-in protection includes open-LED detection, shorted-LED detection, output overvoltage, and thermal shutdown. Analog dimming is achieved through an external reference, while PWM dimming is supported with very low duty cycles for high-contrast applications such as matrix headlamps.
The architecture combines a current-mode controller with an H-bridge gate driver block, allowing seamless transitions between buck and boost without external logic. Internal timing and blanking circuits are designed to prevent false triggering during MOSFET switching transitions. The exposed thermal pad on the PG-TSDSO-24 package reduces junction-to-ambient thermal resistance, supporting sustained high-current LED operation.
Typical applications include automotive matrix LED headlamps, daytime running lights, and high-power LED signalling modules. The wide 4.5V to 55V input range suits both 12V automotive buses and 24V commercial vehicle systems, with load-dump transient tolerance required by automotive electrical standards.
When designing with this device, ensure that the external MOSFETs are rated for the worst-case string voltage, and that the bootstrap capacitor is sized to support the high-side gate drive across all duty cycles. Following the Infineon TLD5191ES reference design minimizes layout-related EMI and protects the dimming accuracy.
This page synthesizes distributor pricing, automotive-grade drop-in alternatives within the LITIX family, and practical PCB layout notes that complement the manufacturer datasheet for engineers designing automotive LED drivers.
直接替換替代品，適用於 TLD5191ESXUMA1 — 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： TLD5191ESXUMA1 （相同外形與佔位） — 差異在於 Package, Topology, Dimming Method, Operating Temperature Range, Input Voltage Range.
TLD5190ESXUMA1
✅ 直接替換📋 參考替代品（不在目錄中）
TLD5097EPXUMA1
✅ 直接替換聯絡詢價
查看資料表 →TLD1125ELXUMA1
✅ 直接替換聯絡詢價
查看資料表 →TLD23313EPXUMA1
✅ 直接替換聯絡詢價
查看資料表 →TLE42062GXUMA2
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TLD5191ESXUMA1 最大額定值與電氣特性
| 拓撲 | H-Bridge DC-DC Controller (Buck / Boost) |
| 輸出數量 | 1 |
| 輸入電壓範圍 | 4.5 V to 55 V |
| Switching Frequency Range | 200 kHz to 700 kHz |
| Output Current Capability | Up to 11 A (controller, external MOSFET) |
| 供應電流 | 7 mA (typical) |
| Dimming | Analog and PWM |
| 封裝 | PG-TSDSO-24 (exposed pad) |
| 腳位數 | 24 |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40C to +150C (automotive grade) |
| Packaging | Tape & Reel (XUMA1 suffix) |
| AEC-Q100 | Qualified (automotive grade) |
| RoHS 狀態 | Compliant |
| Family | LITIX Power |
TLD5191ESXUMA1 腳位配置
| 腳位 1 | BST1 — Bootstrap for high-side switch 1 |
| 腳位 2 | SW1 — Switch node 1 (external MOSFET drain/source) |
| 腳位 3 | HG1 — High-side gate driver 1 |
| 腳位 4 | LG1 — Low-side gate driver 1 |
| 腳位 5 | GND — Ground |
| 腳位 6 | BST2 — Bootstrap for high-side switch 2 |
| 腳位 7 | SW2 — Switch node 2 (external MOSFET drain/source) |
| 腳位 8 | HG2 — High-side gate driver 2 |
| 腳位 9 | LG2 — Low-side gate driver 2 |
| 腳位 10 | VS — Voltage supply |
| 腳位 11 | IN — Input voltage sense |
| 腳位 12 | EN — Enable input |
| 腳位 13 | PWM — PWM dimming input |
| 腳位 14 | ADIM — Analog dimming input |
| 腳位 15 | RT — Switching frequency set resistor |
| 腳位 16 | COMP — Compensation network |
| 腳位 17 | FB — Current feedback |
| 腳位 18 | ISENSE — Current sense input |
| 腳位 19 | OVP — Overvoltage protection |
| 腳位 20 | FAULT — Fault output |
| 腳位 21 | TEST — Test pin (factory) |
| 腳位 22 | NC — Not connected |
| 腳位 23 | NC — Not connected |
| 腳位 24 | NC — Not connected |
典型應用
TLD5191ESXUMA1 適用於 6 應用s: Automotive Matrix LED Headlamps, Daytime Running Lights (DRL), Rear Combination Lamps and Tail Lights, High-Power Industrial LED Lighting, Agricultural and Off-Highway Vehicle Lighting, Emergency Vehicle and Beacon Lighting.
Automotive Matrix LED Headlamps
The TLD5191ESXUMA1's H-bridge topology and 4.5V-55V input make it ideal for automotive matrix LED headlamps requiring pixel-level current control across 12V and 48V vehicle buses. Its 200-700 kHz programmable switching enables high-frequency pulse-width modulation for adaptive driving beam functions, with sub-millisecond dimming transitions between pixels. The AEC-Q100 qualification and integrated open-LED, shorted-LED, and overvoltage protection match ISO 26262 lighting safety requirements.
推薦
Daytime Running Lights (DRL)
For daytime running lights, the TLD5191ESXUMA1 provides buck-boost regulation that tolerates engine cranking transients down to 4.5V while still driving LED strings that may exceed the nominal bus voltage. The integrated PWM dimming supports DRL-to-position-light transitions without external logic, while the PG-TSDSO-24 exposed pad keeps junction temperatures low at the typical 1-3 A DRL string currents.
推薦
Rear Combination Lamps and Tail Lights
In rear lamp clusters combining tail, brake, and turn functions, the TLD5191ESXUMA1 drives high-current LED strings with high-contrast PWM dimming down to very low duty cycles. Its 55V input tolerance handles load-dump events on 24V commercial vehicle electrical systems, while the exposed-pad PG-TSDSO-24 package supports sustained operation at full brake-light power without thermal derating.
推薦
High-Power Industrial LED Lighting
Beyond automotive, the TLD5191ESXUMA1 suits industrial high-bay and architectural LED fixtures requiring 24V to 48V input and multi-amp LED currents. The H-bridge topology drives long LED strings in both buck and boost configurations from a single device, reducing driver count and BOM cost compared with buck-plus-boost discrete designs.
推薦
Agricultural and Off-Highway Vehicle Lighting
Agricultural and construction vehicles use 24V electrical systems with severe load-dump and jump-start transients. The TLD5191ESXUMA1's 55V maximum input and integrated protection features deliver rugged LED lighting for tractors, combine harvesters, and excavators operating in harsh environments. The wide temperature range supports engine-bay mounting and exterior lamp locations.
推薦
Emergency Vehicle and Beacon Lighting
Emergency vehicles require high-intensity flashing and rotating LED beacons with reliable DC-DC conversion across the battery voltage range. The TLD5191ESXUMA1 drives high-power LED arrays with fast PWM dimming for strobe patterns, while its H-bridge topology enables bidirectional current control for bi-color warning modules.
推薦
推薦產品摘要
工程參考資料，適用於 TLD5191ESXUMA1 — 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 | TLD5190ESXUMA1 | TLD5097EPXUMA1 | TLD1125ELXUMA1 | TLD23313EPXUMA1 | TLE42062GXUMA2 |
|---|---|---|---|---|---|---|
| Package | PG-TSDSO-24 | PG-TSDSO-24 (same) | PG-TSDSO-24 (same) | PG-TSDSO-24 (same) | PG-TSDSO-24 (same) | PG-TSDSO-24 (same) |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Topology | H-Bridge (Buck / Boost / Buck-Boost) | H-Bridge (Buck / Boost) | Boost only | Linear constant-current | Linear 3-channel | Linear constant-current |
| Input Voltage Range | 4.5 V to 55 V | 4.5 V to 55 V | 4.5 V to 45 V | 5 V to 40 V | 5 V to 40 V | 5 V to 42 V |
| Switching Frequency Range | 200 kHz to 700 kHz | 200 kHz to 500 kHz | 200 kHz to 700 kHz | N/A (linear) | N/A (linear) | N/A (linear) |
| Maximum Output Current | Up to 11 A (external MOSFET) | Up to 11 A | Up to 6 A | 80 mA per channel | 60 mA per channel | 350 mA |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| PWM Dimming | Yes (very low duty cycle capable) | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- True H-bridge topology with buck-boost support in a single IC (對比TLD5097EPXUMA1)
- Up to 55 V input for 24V commercial vehicles and 48V mild-hybrid systems (對比TLD23313EPXUMA1)
- Multi-amp switching controller capability via external MOSFETs (對比TLD1125ELXUMA1)
設計說明
Estimated: at VIN=13 V, VLED=20 V, ILED=3 A, the TLD5191ESXUMA1 controller itself dissipates approximately 0.5 W (plus external MOSFET losses). With a PG-TSDSO-24 theta_JA around 35 C/W on a 1 oz 2-layer board, this yields a 17.5 C junction temperature rise above ambient. Connect the exposed thermal pad to a copper pour of at least 1 square inch to keep junction temperatures within the 150 C automotive limit.
Place the external MOSFETs, bootstrap diodes, and BST capacitors as close as possible to the SW and BST pins of the TLD5191ESXUMA1 to minimize parasitic inductance. Keep the current-sense traces short and use a Kelvin connection to ISENSE for accurate current regulation. The exposed pad must be soldered to a continuous ground plane with multiple thermal vias for effective heat dissipation.
Common pitfalls when designing with the TLD5191ESXUMA1 include omitting the bootstrap capacitor (which prevents high-side drive failure), exceeding the 55 V maximum input voltage during load-dump transients, and selecting MOSFETs with insufficient VDS rating for the LED string voltage. Always populate the bootstrap diode and capacitor on both halves of the H-bridge, and verify that the external MOSFET VDS exceeds the maximum expected LED string voltage plus ringing margin.
合規資訊
AEC-Q100 qualified per Infineon LITIX Power family datasheet. RoHS and REACH compliant. Halogen-free and lead-free per package marking.
