Weltrend | Products

Supervisor ICs

WT7578

WT7578 is a switching power supply supervisor which monitors three channel of +12V outputs. The protections include Over Voltage Protection (OVP), Under Voltage Protection (UVP), Over Current Protection (OCP), External Voltage Protection (VX), and Under oltage Lockout (UVLO). When fault condition is detected, PGO is asserted to LOW and FPOB latched HIGH.

Features

- Three channels for 12V OVP, UVP and OCP
- External Voltage Protection (VX)
- Fault protection latch with open-drain output stage
- PGO(Power Good Output) with open-drain output stage
- 55 μs UVP debounce (*T1), (*T2)
- 3 ms UVP debounce (*T3), (*T4)
- 22 μs OVP debounce
- 20 ms OCP debounce
- 1 ms VX debounce
- 38 ms PSONB debounce
- 73 μs PGI debounce
- 250 ms PGO delay
- Short-circuit turn-on protection
- 4ms PSONB control to FPOB turn-off delay
- VCC under voltage lockout
- Package Type: PDIP-14 and SOP-14

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