User guide

9
Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
Data Sheet
HIGH VOLTAGE HALL EFFECT LATCH AH278
Typical Applications
Figure 13. Typical Application Circuit with D1
Z1, Z2: Zener diode, 2*V
CC
≤V
Z
≤60V
R1: R1
< ( V
CC
-5.5V)/16mA, 0.5W (Note 3)
Note 3: Recommended R1 for different V
CC
V
CC
(V) 7 8 9 1011121314151617
R1 (
Ω) 0 0 0 0 0 0 470 510 560 620 680
V
CC
(V) 18 19 20 21 22 23 24 25 26 27 28
R1 (
Ω) 750 820 820 910 1k 1k 1.1k 1.2k 1.2k 1.3k 1.3k
AH278
V
CC
DO DOB GND
12
3
4
COIL1 COIL2
V
CC
D1
Z2
Z1
R1