TLD5191ESXUMA1 - 55V H-Bridge LED DC-DC Controller | Infineon
MPN: TLD5191ESXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.65 | $46.50 |
| 100 | $4.1 | $410.00 |
| 500 | $3.65 | $1,825.00 |
| 1,000 | $3.25 | $3,250.00 |
TLD5191ESXUMA1 Overview
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.
Drop-in alternatives for TLD5191ESXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLD5191ESXUMA1 (same form factor and footprint) — differing in Package, Operating Temperature Range, Protection Features, Topology, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLD5190ESXUMA1
✅ Drop-In📋 Reference alternative (not in catalog)
TLD5097EPXUMA1
✅ Drop-In✓ In Stock
$1.9 / Unit
View Datasheet →TLD1125ELXUMA1
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →TLD23313EPXUMA1
✅ Drop-In✓ In Stock
$0.68 / Unit
View Datasheet →TLE42062GXUMA2
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.15 / Unit
View Datasheet →TLD5191ESXUMA1 Maximum Ratings & Electrical Characteristics
| Topology | H-Bridge DC-DC Controller (Buck / Boost) |
| Number of Outputs | 1 |
| Input Voltage Range | 4.5 V to 55 V |
| Switching Frequency Range | 200 kHz to 700 kHz |
| Output Current Capability | Up to 11 A (controller, external MOSFET) |
| Supply Current | 7 mA (typical) |
| Dimming | Analog and PWM |
| Package | PG-TSDSO-24 (exposed pad) |
| Pin Count | 24 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +150C (automotive grade) |
| Packaging | Tape & Reel (XUMA1 suffix) |
| AEC-Q100 | Qualified (automotive grade) |
| RoHS Status | Compliant |
| Family | LITIX Power |
TLD5191ESXUMA1 Pin Configuration
| Pin 1 | BST1 — Bootstrap for high-side switch 1 |
| Pin 2 | SW1 — Switch node 1 (external MOSFET drain/source) |
| Pin 3 | HG1 — High-side gate driver 1 |
| Pin 4 | LG1 — Low-side gate driver 1 |
| Pin 5 | GND — Ground |
| Pin 6 | BST2 — Bootstrap for high-side switch 2 |
| Pin 7 | SW2 — Switch node 2 (external MOSFET drain/source) |
| Pin 8 | HG2 — High-side gate driver 2 |
| Pin 9 | LG2 — Low-side gate driver 2 |
| Pin 10 | VS — Voltage supply |
| Pin 11 | IN — Input voltage sense |
| Pin 12 | EN — Enable input |
| Pin 13 | PWM — PWM dimming input |
| Pin 14 | ADIM — Analog dimming input |
| Pin 15 | RT — Switching frequency set resistor |
| Pin 16 | COMP — Compensation network |
| Pin 17 | FB — Current feedback |
| Pin 18 | ISENSE — Current sense input |
| Pin 19 | OVP — Overvoltage protection |
| Pin 20 | FAULT — Fault output |
| Pin 21 | TEST — Test pin (factory) |
| Pin 22 | NC — Not connected |
| Pin 23 | NC — Not connected |
| Pin 24 | NC — Not connected |
Typical Applications
TLD5191ESXUMA1 is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for TLD5191ESXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- True H-bridge topology with buck-boost support in a single IC (vs TLD5097EPXUMA1)
- Up to 55 V input for 24V commercial vehicles and 48V mild-hybrid systems (vs TLD23313EPXUMA1)
- Multi-amp switching controller capability via external MOSFETs (vs TLD1125ELXUMA1)
Design Notes
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.
Compliance Information
AEC-Q100 qualified per Infineon LITIX Power family datasheet. RoHS and REACH compliant. Halogen-free and lead-free per package marking.
