[Channel 2]
Step-down control only (HA16116)
Booster control only (HA16121)
Vref
19
from
UVL
to S.V
IN
−
+
CL2
5k
Vref
UVL
H
L
V
L
V
H
from UVL
OR
OVP
UVL
output
0.8V
+
+
−
PWM COMP 2
OUT2*
NAND
(HA16116)
0.2 V
V
IN
−
EA2
+
18
17
16
15
14
13
12
11
TIM
ON/
OFF
IN(−)2
E/O2
DB2
CL2
OUT2
P.V
IN
S.V
IN
20
Block Diagram
Rev.2.0, Sep.18.2003, page 5 of 33
V
IN
Latch
S
R
0.8V
Q
−
+
+
Triangle wave
oscillator circuit
1.6 V
HA16116FP/FPJ, HA16121FP/FPJ
ON/
OFF
2.5 V output
band gap
reference
voltage
generator
circuit
V
IN
from UVL
NAND
OUT1
0.8V
5k
1.0 V
triangle wave
latch reset pulse
1.1 V
Bias current
R
T
+
EA1
−
PWM COMP 1
Vref
5k
from
UVL
CL1
−
+
0.2 V
to S.V
IN
from
UVL
1
C
T
) in the case of
R
T
IN(+)1
2
3
4
5
IN(−)1
6
E/O1
7
DB1
[Channel 1] (HA16116/HA16121)
Step-down or inverting control
8
CL1
9
OUT1
10
P.GND
S.GND
Note:
*
This block is AND (
HA16121.
RENESAS [ RENESAS TECHNOLOGY CORP ]
