This IC is a step-up / flyback switching regulator controller developed using high withstand voltage CMOS process technologies.
Its wide input operating range of 3.0 V to 36 V makes it suitable for powering automotive start-stop systems and emergency battery backup systems. When this IC is used to configure a converter and the output voltage (VOUT) of the
converter is applied to the VIN pin in a bootstrap configuration, the input voltage can be extended below the operating input voltage range after startup.
This IC contributes to system space saving as it adopted suitable packages for high-density mounting like small-sized HSNT-8(2030), can operate at very high switching frequencies, and the peripheral parts can be made compact.
An overcurrent protection circuit protects the IC and the coil from excessive load current, and a thermal shutdown circuit prevents damage from heat generation.
Features
- Input voltage
- 3.0 V to 36.0 V
- Low voltage operation after startup (bootstrap configuration)
- Control system
- Current mode
- FB pin voltage accuracy
- ±1.5%
- Oscillation frequency
- 2.2 MHz typ., 400 kHz typ.
- Overcurrent protection function
- Pulse-by-pulse method
- Thermal shutdown function
- 170°C typ. (detection temperature)
- Short-circuit protection function
- Hiccup control, Latch control
- Soft-start function
- 5.8 ms typ.
- Under voltage lockout function (UVLO)
- 2.75 V typ. (detection voltage)
- Input and output capacitors
- Ceramic capacitor compatible
- Operation temperature range
- Ta = −40°C to +125°C
- Lead-free (Sn 100%), halogen-free
- Withstand 45 V load dump
- AEC-Q100 in process*1
*1. Contact our sales representatives for details.
Applications
- Automotive and industrial step-up flyback converters
- Automotive start-stop systems
- Emergency battery backup systems
- Automotive LED lamps
- For automotive use (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.)