LT4430IS6#TRMPBF

LT®4430 optocoupler driver 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 stages to drive the optocoupler, and unique overshoot control circuitry. This 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 optocoupler driver provides 10mA of output current and is short-circuit protected. A unique overshoot control function prevents output overshoot on start-up and short-circuits recovery with a single capacitor. Application includes 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.

• 600mV reference (1.25% over temperature), overshoot control function prevents output
• Overshoot on start-up and short-circuit recovery, ground-referenced opto-coupler drive
• High bandwidth error amplifier permits simple Loop frequency compensation
• Input voltage range from 3 to 20V (TA = 25°C, VIN = 5V)
• Typ undervoltage lockout threshold is 2.2V (OC Held Low for VIN <lt/> VUVLO (E-, I-Grades), TA = 25°C)
• Typical supply current is 1.9mA (3V ≤ VIN ≤ 20V (E-, I-Grades), TA = 25°C)
• Typical OC clamp voltage is 0.93V (TA = 25°C, VIN = 5V)
• Typical error amplifier unity-gain bandwidth is 9MHz (no load, TA = 25°C, VIN = 5V)

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