ES51961
3 3/4 MANU DMM
7. Test Circuit
(1) DC test
(2) FREQ input test
F
R
E
Q
-100 mV
REFLO
REFHI
VIN+
200
1M
0.1u
+
DC IN
-
2.2u
VIN-
C1815
NPN
PTC
1.5K
-3V
FREQ IN
(3) AC test
(4) Peak function test
PTC 2.2k
REFLO
REFHI
VIN+
-100 mV
470
PKIN
VIN+
VIN-
DC
400 mV
O
P
O
O
P
O
P
-
1M
0.1u
INPUT
+
AC
0V
AC IN
AC/DC
rectifier
88M
0.1u
1.0u
Under voltage mode, if Peak function
is enabled, PKIN input will be enabled
0.47u
D2
22K
10K
1.0u
5K
22K D1
(5) LOGIC test
(6) Low battery test(9V)
9V
ES51961
PTC 2.2k
470
LOGIC
HIGH
PKIN
680K
270K
LBAT9
(RED)
0.1u
AGND
V-
LOGIC
LOW
(BLACK)
V-
0V
Note: Light shielding for diode.
21
2006/1/24
CYRUSTEK [ Cyrustek corporation ]
