SRP Hitachi Semiconductor, SRP Datasheet - Page 4
SRP
Manufacturer Part Number
SRP
Description
High Speed Current Mode PWM Control IC for Switching Power Supply
Manufacturer
Hitachi Semiconductor
Datasheet
1.SRP.pdf
(31 pages)
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HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP
Block Diagram
4
(OVP input)
Note: 1. Blocks with bold line are not included in HA17384SPS/SRP.
COMP
RT/CT
CS
FB
1
2
3
4
8.4 mA
7.0V
1V
+
Oscillator
CS
1
2 Vref
+
EA
+
OVP
6.5V
(2.5V)
R
0.8mA
*
2R
1.2V
2V
1
+
F
PWM LOGIC
R
S
Vref
latch
CS
160 C
sense
2.8 V
TSD
Q
H
L
R
S
UVL1
OVP
latch
VL VH
Q
Latch set
pulse
Totem pole
output circuit
NOR
OUT
OR
Vref > 4.7V
5V band
gap
reference
regulator
UVL2
34V
8
7
6
5
Vref
V
OUT
GND
IN