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KA3501 データシート(PDF) 1 Page - Fairchild Semiconductor

部品番号 KA3501
部品情報  PC SMPS Supervisory IC
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メーカー  FAIRCHILD [Fairchild Semiconductor]
ホームページ  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

KA3501 データシート(HTML) 1 Page - Fairchild Semiconductor

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©2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.2
Features
• Complete House Keeping Circuit
• Few External Components
• Positive Voltage Protection
• Negative Voltage Protection
• High Current Drive Output for SCR
• Precision Voltage Reference for 5V/12V Outputs
• Power Good Signal Generator with Hysteresis
Description
The KA3501 is complete housekeeping circuits for use in the
secondary side of SMPS(Switched Mode Power Supply).
This IC(Integrated Circuit) contains a precision voltage
reference, protection circuits and a power good signal
generator. It also has a high current drive output for use in
conjunction with an external "crowbar" SCR. The reference
voltage is trimmed to
±2% for correct output voltages(+5V/
+12V) and power good signal generator is to monitor the
voltage level of power good supply for safe operation in a
microprocessor circuit. Using the KA3501 requires few
external components to accomplish a complete
housekeeping circuit for SMPS(Switched Mode Power
Supply). The KA3501 is available in an 14-pin DIP.
Internal Block Diagram
Positive
Voltage
Protection
Negative
Voltage
Protection
+5V
Detecting
COMP
VCC
Detecting
COMP
lchg
START UP
INTERNAL
BIAS
+2.5V
REFERENCE
VOLTAGE
4
7
8
11
12
10
13
1
3
9
2
14
6
5
VCC1(+5V)
VCC
Vin1
PG
Ve
Vin2
GATE
Feedback
Vref
VCC2(+12V)
Vcont
GND
Td
Timing
KA3501
PC SMPS Supervisory IC
14-DIP
1


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