The LT4430HS6 drives the opto-coupler that crosses the galvanic barrier in an isolated power supply. The IC contains a precision-trimmed reference, a high bandwidth error amplifier, an inverting gain of 6 stage to drive the optocoupler and unique overshoot control circuitry.
The LT4430’s 600mV reference provides ±0.75% initial accuracy and ±1.25% tolerance over temperature. A high bandwidth 9MHz error amplifier permits simple frequency compensation and negligible phase shift at typical loop crossover frequencies. The opto-coupler driver provides 10mA of output current and is short-circuit protected. A unique overshoot control function prevents output overshoot on start-up and short-circuit recovery with a single capacitor.
The LT4430HS6 is available in the low profile 6-lead TSOT-23 package.
Feature
- 600mV Reference (1.25% Over Temperature)
- Wide Input Supply Range: 3V to 20V
- Overshoot Control Function Prevents Output Overshoot on Start-Up and Short-Circuit Recovery
- High Bandwidth Error Amplifier Permits Simple Loop Frequency Compensation
- Ground-Referenced Opto-Coupler Drive
- 10mA Opto-Coupler Drive with Current Limiting
- Low Profile (1mm) ThinSOT™ Package
Applications
- 48V Input Isolated DC/DC Converters
- Isolated Telecommunication Power Systems
- Distributed Power Step-Down Converters
- Offline Isolated Power Supplies
- Industrial Control Systems
- Automotive and Heavy Equipment
(Picture: Pinout)
