APW7068
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over VCC12=12V, and T
A
=-20~70°C. Typical values
are at T
A
=25
°
C.
Symbol
PROTECTION
Parameter
Test Conditions
APW7068
Min
Typ
135
50
36
40
8.5
0.792 0.800 0.808
-8
1.5
0.25
0.4
3
0.5
1
2.2
+8
44
Max
Unit
V
FB-OV
FB Over Voltage Protection Trip Point
I
OCSET
T
SS
OCSET Current Source
Internal Soft-Start Interval (NOTE3)
Percent of V
REF
%
%
uA
ms
V
mV
mA
mA
uF
V
FBL-UV
FBL Under Voltage Protection Trip Point Percent of V
REF
SOFT START
F
OSC
=300kHz
REF_OUT
V
REF_OUT
Output Voltage
Offset Voltage
I
REF_OUT
Source Current
Sink Current
Output Capacitance
NOTE3: Guaranteed by design.
Typical Application Circuit
C1
2.2nF
Q3
R2
3.9K
2N7002
ON/OFF
Q1
APM2509
C
IN1
470uFx2
VIN1
12V
C2
0.01uF
C4
R1
0.1uF
1.5K
L
1uH
VOUT1
1.2V
VOUT1
R3
22Ω
C3
22nF
1
2
3
BOOT
FS_DIS
COMP
FB
DRIVE
FBL
GND
UGATE
PHASE
14
13
C6
2.2nF
VIN2
3.3V
R
GND1
3K
C
OUT1
470uFx2
PGND 12
Q2
LGATE
OCSET
REF_OUT
VCC12
11
10
9
8
C8
1uF
APM2506
C
IN2
470uF
Q4
APM3055
4
5
C5
R5
6
7
R6
2.2Ω
R4
VOUT2
2.5V
2.5K
APW7068
R
GND2
1.17K
R7
12V
R8
2.2Ω
C
OUT2
470uF
C7
1uF
* C5, R5 for specific application
Copyright
©
ANPEC Electronics Corp.
Rev. A.2 - Jun., 2006
6
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
