ISSI IS32LT3175N/P Single-Channel Linear LED Drivers
ISSI IS32LT3175N/P Single-Channel Linear LED Drivers come with fade in/out and PWM dimming. The regulators serve as a stand-alone LED driver-configurable from 20mA to 150mA with external resistors, no microcontroller is necessary. A logic level “courtesy light” signal from the PWM pin can be interfaced to precisely drive the LED channel. The IS32LT3175P obtains a positive polarity PWM signal. In addition, the IS32LT3175N obtains a negative polarity PWM signal. The regulator integrates a 63-step fade-in and fades out the algorithm (Gamma correction). This causes the output LED current to increasingly rise up to the full source value after the EN pin is pulsed.
Features
- Operating voltage 5V to 42V
- Single-channel current source
- Programmable current via a single external resistor
- Configurable from 20mA to 150mA
- Momentary contact button EN input
- Input is debounced and latched
- Higher priority than PWM input
- Gamma corrected Fade In/Out algorithm
- Pull-down resistors set independent fade IN and
- OUT ramp time
- PWM input pin is driven by external PWM source
- PWM directly drives the current source
- IS32LT3175P – Positive polarity
- IS32LT3175N – Negative polarity
- Fault Protection:
- OUT pin shorted to GND
- ISET pin shorted to GND
- Over-temperature
- SOP-8-EP package
- Automotive Grade: AEC-Q100
- -40°C to +125°C operating temperature range
Applications
- Map/Dome light
- Puddle lamp in doors
- Glove box
- Vanity mirror
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發佈日期: 2017-01-31
| 更新日期: 2024-03-05