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PDF KA7553A Data sheet ( Hoja de datos )
| Número de pieza | KA7553A | |
| Descripción | SMPS Controller | |
| Fabricantes | Fairchild | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de KA7553A (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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KA7552A/KA7553A
SMPS Controller
www.fairchildsemi.com
Features
• Built-in drive circuits for direct connection power
MOSFET (lO = ±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
Internal Block Diagram
BIAS
(4V)
OFF
4.3K
2.8V
+
-
1
0.56 ~ 0.42V
+
_
CS
8
+ 7V
-
CT RT
7 1 10uA
OSC
UVLO
3.6V
2.4V
1.9V
+
-
-
- PWM
0.24V _
+
O.C.P
R
Q
S
23
FB IS(+)
©2004 Fairchild Semiconductor Corporation
VCC
6
5
OUTPUT
4
GND
Rev. 1.0.2
1 page  
Ordering Information
Product Number
KA7552A
KA7553A
Package
8-DIP
Operating Temperature
-25 ~ +85°C
KA7552A/KA7553A
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet KA7553A.PDF ] | |
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