封裝資訊
| 封裝 | 引腳 VQFN (RHB) | 32 |
| 作業溫度範圍 (°C) -40 to 125 |
| 包裝數量 | 運送包裝 3,000 | LARGE T&R |
TPS92391 的特色
- Input voltage operating range 3 V to 48 V
- Six high-precision current sinks
- Up to 200-mA DC current for each current sink
- Current matching 1% (typical)
- Dimming ratio 32 000:1 using 152-Hz LED output PWM frequency
- Up to 16-bit LED dimming resolution with I2C, or PWM input
- 8 Configurable LED strings configuration
- Auto-phase shift PWM dimming
- 12-bit Analog dimming
- Switching frequency 100 kHz to 2.2 MHz
- Boost spread spectrum for reduced EMI
- Boost sync input to set boost switching frequency from an external clock
- Up to 48-V VOUT boost or SEPIC DC/DC
controller
- Switching frequency 100 kHz to 2.2 MHz
- Boost spread spectrum for reduced EMI
- Boost sync input to set boost switching frequency from an external clock
- Extensive fault diagnostics
TPS92391 的說明
The TPS92391 is an automotive high-efficiency LED driver with boost controller. The Six high-precision current sinks support phase shifting that is automatically adjusted based on the number of channels in use. LED brightness can be controlled globally through the I²C interface or PWM input.
The boost controller has adaptive output voltage control based on the headroom voltages of the LED current sinks. This feature minimizes the power consumption by adjusting the boost voltage to the lowest sufficient level in all conditions. A wide-range adjustable frequency allows the TPS92391 to avoid disturbance for AM radio band.
The TPS92391 supports built-in hybrid PWM dimming and analog current dimming, which reduces EMI, extends the LED lifetime, and increases the total optical efficiency.