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TF12A

更新时间: 2024-10-30 07:07:55
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其他 - ETC 电子
页数 文件大小 规格书
13页 461K
描述
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TF12A 数据手册

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HandleElectronicsCo.,Ltd.  
Tel:852-26378080  
EtronElectronicsTechnologyCo.,Ltd  
Tel:020-36471221  
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TF12A  
Low Power OFF-Line SMPS Primary Switcher  
Features  
Description  
The TF12A is a low power primary switcher best suitable  
for Off-line SMPS battery charger adapters, auxiliary power  
supplies for industrial systems and standby power supplies for  
TVs or monitors . It consists of a dedicated current mode PWM  
controller and a high-voltage Power MOSFET.  
VDD range: 9V to 38V  
60 kHz fixed frequency operation  
Current-mode control  
Auxiliary under-voltage lockout with hysteresis  
High-voltage start-up current source  
Over-voltage, over-current and over-temperature  
protection with auto-restart  
Industrial temperature range: -40 °C to +85 °C  
Drop-in replacement for the VIPer12A  
The TF12A operates at fixed 60 kHz switching frequency.  
Its control circuitry provides large VDD range desired in  
applications in which auxiliary power supply changes are  
expected. It also provides over-voltage, over-current and over-  
temperature protection.  
The TF12A is offered in 8-pin PDIP and SOIC narrow packages.  
It operates over an extended -40 °C to +85 °C temperature  
range.  
Applications  
Switch Mode Power Supplies  
Auxiliary Power Supplies for Industrial Systems  
Adapters for Portable Electronics  
Ordering Information  
PART NUMBER PACKAGE PACKING  
Year Year Week Week  
(qty) MARK  
YYWW  
TF12A-3AS  
PDIP-8  
Tube,  
50  
TF12  
Typical Power Capability  
Lot ID  
MAINS TYPE  
PDIP-8  
13W  
SOIC-8  
8W  
YYWW  
TF12  
Lot ID  
TF12A-TAU  
TF12A-TAH  
SOIC-8(N) Tube,  
95  
European (195 - 265 Vac)  
Universal (85 - 265 Vac)  
SOIC-8(N) Tape & Reel, 2500  
8W  
5W  
Function Diagram  
VDD  
DRAIN  
ON/OFF  
60 kHz  
Oscillator  
Regulator  
S
Over-  
Temperature  
Detector  
R1  
R2  
FF  
Q
Internal  
Supply  
PWM  
Latch  
R3  
R4  
+
-
Blanking  
-
8/14.5V  
42V  
+
0.23V  
Over-Voltage  
Latch  
R
+
-
S
FF  
Q
1 k  
230  
FB  
SOURCE  
1
June 2011  

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