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KA7553AのメーカーはFairchildです、この部品の機能は「SMPS Controller」です。 |
部品番号 | KA7553A |
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部品説明 | SMPS Controller | ||
メーカ | Fairchild | ||
ロゴ | |||
このページの下部にプレビューとKA7553Aダウンロード(pdfファイル)リンクがあります。 Total 6 pages
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 KA7552A/KA7553A
Electrical Characteristics (Continued)
(VCC = 18V, FOSC = 135kHz, TA = 25°C, unless otherwise specified)
Parameter
Symbol
UNDER VOLTAGE LOCKOUT SECTION
Start-up threshold voltage
VTH(ST)
Minimum operating voltage
VOPR(Min)
Hysteresis
VHYS
ON/OFF CONTROL SECTION
Source current(pin8)
ISOURCE(CS)
On threshold voltage
VTH(ON)
Off threshold voltage
VTH(OFF)
OUTPUT SECTION
Low output voltage
VOL
High output voltage
Rise time(Note1)
Fall time(Note1)
VOH
TR
TF
OVERALL
Stand-by current
ISB
Operating current
ICC(OPR)
Power supply current off
ICC(OFF)
Power supply current shutdown
ICC(SD)
Conditions
-
-
-
VPIN8 = 0V
VPIN8 : OFF->ON
VPIN8 : ON -> OFF
IO = 100mA, VCC = 18V
IO = -100mA, VCC = 18V
No load
No load
VCC = 14V
VPIN2 = 0V
VPIN8 = 0V
VPIN8 = 7.6V
Min. Typ. Max. Unit
15.5 16.0 16.5
8.20 8.70 9.20
6.40 7.30 8.20
V
V
V
-15
0.45
0.30
-10
0.56
0.42
-5
0.70
0.55
uA
V
V
-
16.0
-
-
1.3
16.5
50
50
1.8
18.0
-
-
V
V
ns
ns
- 90 150 uA
- 9 15 mA
- 1.1 1.8 mA
- 1.1 1.8 mA
Note :
1. These parameters, although guaranteed, are not 100% tested in production.
2. Recommend operating condition :
- Vcc(min) = 12V
- RT = 3.3kΩ ~ 10kΩ
- Oscillation frequency = 5kHz ~ 600kHz
- Soft start capacitor(CS) = 0.1uF ~ 1uF
3
3Pages KA7552A/KA7553A
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
6/25/04 0.0m 001
Stock#DSxxxxxxxx
2003 Fairchild Semiconductor Corporation
6 Page | |||
ページ | 合計 : 6 ページ | ||
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PDF ダウンロード | [ KA7553A データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
KA7553 | PWN CONTROLLER | Samsung |
KA7553A | SMPS Controller | Fairchild |