具有熱共享功能的汽車類雙通道 40V 高側 LED 驅動器
| Number of channels (#) | 2 |
| Topology | Current Source |
| Rating | Automotive |
| Operating temperature range (C) | -40 to 125 |
| | |
| Vin (Min) (V) | 4.5 |
| Vin (Max) (V) | 40 |
| Vout (Min) (V) | 0 |
| Vout (Max) (V) | 40 |
| Iout (Max) (A) | 0.3 |
| Features | Thermal Sharing, Fault Detection, Fault Diagnostic, LED Open Detection, LED Short to Ground Detection, PWM Dimming, Thermal Shutdown |
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to 125°C, TA
- Wide input voltage range: 4.5 V to 40 V
- Thermal sharing by external shunt resistor
- Low supply current in fault mode
- Two high-precision current regulation:
- Up to 150-mA current output for each channel
- ±5% accuracy over full temperature range
- Independent current setting by resistor
- Independent PWM pin for brightness control
- Low dropout voltage:
- Maximum dropout: 350 mV for 150 mA
- Diagnostics and protection
- LED open-circuit with auto-recovery
- LED short-to-GND with auto-recovery
- Diagnostic enable with adjustable threshold
- Fault bus configurable as either one-fails–all-fail or only-failed-channel off (N-1)
- Thermal shutdown
- Operation junction temperature range:–40°C to 150°C
The TPS92622-Q1 two-channel LED driver includes a unique thermal management design to reduce temperature rising on the device. The TPS92622-Q1 is a linear driver directly powered by automotive batteries with large voltage variations to output full current loads up to 150 mA per channel. External shunt resistors are leveraged to share output current and dissipate power out of the driver. The device full-diagnostic capabilities include LED open, LED short-to-GND circuit, and device overtemperature protection.
The one-fails–all-fail feature of TPS92622-Q1 can work together with other LED drivers, such as the TPS9261x-Q1, TPS9262x-Q1, TPS9263x-Q1, and TPS92830-Q1 devices, to address different requirements.
