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KA7552 数据手册 - Samsung（三星）
制造商:
Samsung（三星）
封装:
DIP
Pictures:
3D模型
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KA7552数据手册
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若手册格式错乱，请下载阅览PDF原文件
©2004 Semiconductor Components Industries, LLC.
October-2017, Rev. 2
Publication Order Number:
KA7553A/D
Features
• Built-in drive circuits for direct connection power
MOSFET (l
O
= ±1.5A)
• Wide operating frequency range (5kHz ~ 600kHz)
• Pulse by pulse over current limiting
• Over load protection
• On/off control by external trigger
• Internal UVLO
• Low standby current (typ. 90uA)
• Soft start circuit
Description
The KA7552A/KA7553A are switching power control IC
for wide operating frequency range. The internal circuits
include pulse by pulse current limiting, protection, on/off
control by external trigger, low standby current, soft start,
and high current totempole output for driving a POWER
MOSFET. Maximum duty of the KA7552A is 70% and the
KA7553A is 46%. When duty is maximum, the input
threshold voltage of pin2 & pin8 are not same in KA7552A
and KA7553A.
8-DIP
1
Internal Block Diagram
8
7
1
6
5
4
3
2
CS
C
T
R
T
V
CC
OUTPUT
GND
IS(+)
FB
0.56 ~ 0.42V
10uA
7V
PWM
2.4V
1.9V
O.C.P
0.24V
4.3K
OFF
3.6V
2.8V
OSC
UVLO
R
S
Q
BIAS
(4V)
+
_
+
-
-
-
_
+
+
-
+
-
KA7552A/KA7553A
SMPS Controller
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