LB1841V

No. 4384-5/7

DEL

OUT

RD

H

limit

L

Non-limit (saturation)

H

L

Saturation

H

• Set current detection circuit

(1) When DEL = High

setting amplifier is smaller than the input voltage at the + side (larger vs. ground). The drive current therefore

increases and the output pnp transistor saturates. When this condition is detected, a signal is sent to the set

current detection circuit and the RD output becomes High.

the RD output becomes Low.

(2) When DEL = Low

When a Low signal is input to the DEL pin, operation of the current setting amplifier is canceled. Therefore as

described above, the output transistor saturates and the RD output becomes High.

The above conditions are shown in the table below.

Output Current Limiter and Setting Current Detection Circuits Block Diagram

LIR

PBC

Rf

P-G

DEL

M

Setting current

detection circuit