LV8042LG
Output stage transistor function
The OUTA → OUTB direction is assumed to be for charge (current increasing direction).
VM
VM
VM
ON
U1
OUTA
L1
OFF
OFF
U2
OUTB
L2
ON
OFF
U1
OUTA
L1
ON
OFF
U2
OUTB
L2
ON
OFF
U1
OUTA
L1
ON
OFF
U2
OUTB
L2
ON
(CHARGE)
(SLOW)
(FAST)
Chopping frequency (fchop) setting method
This is the frequency for chopping, which is determined by the external resistor for constant-current control.
The chopping frequency set by the resistance connected to R pin (pin 32) is shown below.
300
250
200
150
100
50
0
0 10 20 30 40 50 60 70 80 90 100
R resistance - kΩ
ILV00204
The recommended chopping frequency ranges from 50 to 200kHz.
No.A0004-21/29