RV5VE001A Ver la hoja de datos (PDF) - RICOH Co.,Ltd.

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RV5VE001A

MULTI-POWER SUPPLY

RICOH Co.,Ltd. 

RV5VE0×××

• Formula for calculating Reset Delay Time is

tD = 0.69 × RD × CD

wherein RD is the resistance of a built-in resistor and can be set at 1MΩ in IC, so that the above formula is:

tD = 0.69 × 106× CD

Voltage Detector with Delay Circuit is constructed as shown below.

• Block Diagram of Voltage Detector with delay Circuit.

VSEN2

Current Source

RD

+

–

Vref

CD

Extermal Capacitor

VDD

RESET

GND

5. Main Power Source Control (in the case of Optional Mask Version)

• This IC includes built-in Edge Trigger Flip-Flop (Rising Edge Operation) and AND Gate, so that Main Power

Source of any instruments can be turned ON/OFF by “AND” of Toggle Input and Level Input.

• Edge Trigger Flip-Flop is reset by One Shot Pulse Generator when Voltage Detector 1 or 2 detects the lowering

of the voltage. This Flip-Flop can be continuously reset during the detection.

6

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