AA18380 Overview
Internal error amplifier inverting input pin Soft start and short circuit protection setting capacitor connection pin IC power supply pin Output current setting and control pin Output voltage monitoring pin Ground pin Timing capacitor & resistor connection pin for setting the internal PWM frequency Error amplifier output pin BLOCK DIAGRAM Vcc 3 OSC 7 Reference Voltage Supply 1.25V 0.8V 0.1V Sawtooth wave Oscillator...
AA18380 Key Features
- Wide operating supply voltage range: 1.8 V to 15 V
- Stable reference voltage circuit: 1.25V
- Low current consumption: Typically 5.5 mA in operation, 1 µA or less in stand-by
- Wide PWM output frequency range: 10 kHz to 1 MHz
- Incorporates a soft start circuit and adjustable soft start time
- Timer latch short-circuit protection circuit (SCP)
- Low input voltage malfunction prevention circuit (U.V.L.O.)
- On/off control function
- Totem-pole type output by using an external resistor to set the output current (for NPN transistors)