KA1H0680RFB-TU FAIRCHILD [Fairchild Semiconductor], KA1H0680RFB-TU Datasheet

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KA1H0680RFB-TU

Manufacturer Part Number
KA1H0680RFB-TU
Description
Fairchild Power Switch(FPS)
Manufacturer
FAIRCHILD [Fairchild Semiconductor]
Datasheet
Features
• Precision fixed operating frequency
• KA1M0680B,KA1M0680RB (67KHz)
• KA1H0680B,KA1H0680RFB (100KHz)
• Pulse by pulse over current limiting
• Over load protection
• Over voltage protection (Min. 23V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• Latch up mode (KA1M0680B,KA1H0680B)
• Auto restart (KA1M0680RB,KA1H0680RFB)
• Soft start
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
KA1M0680B/KA1M0680RB/
KA1H0680B/KA1H0680RFB
Fairchild Power Switch(FPS)
#5 Soft Start
#3 V
#4 FB
CC
5V
5 A
7.5V
25V
32V
1mA
+
+
9V
2.5R
OVER VOLTAGE S/D
1R
Thermal S/D
+
OSC
Vref
5V
0.1V
L.E.B
Good
logic
Description
The Fairchild Power Switch(FPS) product family is specially
designed for an off-line SMPS with minimal external
components. The Fairchild Power Switch(FPS) consist of high
voltage power SenseFET and current mode PWM controller IC.
PWM controller features integrated fixed oscillator, under
voltage lock out, leading edge blanking, optimized gate turn-on/
turn-off driver, thermal shut down protection, over voltage
protection, temperature compensated precision current sources
for loop compensation and fault protection circuit. compared to
discrete MOSFET and controller or R
solution, a Fairchild Power Switch(FPS) can reduce total
component count, design size, weight and at the same time
increase & efficiency, productivity, and system reliability. It has
a basic platform well suited for cost effective design in either a
flyback converter or a forward converter.
S
R
TO-3P-5L
1
1.DRAIN 2.GND 3.V
Q
Power on reset
Internal
bias
S
R
Q
CC
TO-3PF-5L
4.FB 5.Soft Start
1
SFET
www.fairchildsemi.com
CC
switching converter
#1 DRAIN
#2 GND
Rev.1.0.2

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KA1H0680RFB-TU Summary of contents

Page 1

... Over load protection • Over voltage protection (Min. 23V) • Internal thermal shutdown function • Under voltage lockout • Internal high voltage sense FET • Latch up mode (KA1M0680B,KA1H0680B) • Auto restart (KA1M0680RB,KA1H0680RFB) • Soft start Internal Block Diagram # 32V ...

Page 2

... KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB Absolute Maximum Ratings Parameter (1) Maximum Drain voltage Drain Gate voltage (R = Gate source (GND) voltage (2) Drain current pulsed Single pulsed avalanche energy (4) Avalanche current Continuous drain current (T = Continuous drain current (T =100 C) C Maximum Supply voltage Input voltage range ...

Page 3

... Turn on delay time Rise time Turn off delay time Fall time Total gate charge (gate-source+gate-drain) Gate source charge Gate drain (Miller) charge Note: Pulse test: Pulse width 300 S, duty cycle --- - R KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB Symbol Condition BV V =0V, I =50 A DSS =Max., Rating =0V GS ...

Page 4

... These parameters, although guaranteed, are tested in EDS (wafer test) process 4 Symbol Condition V - START V After turn on STOP KA1M0680B KA1M0680RB F OSC KA1H0680B KA1H0680RFB ( +85 C KA1M0680B KA1M0680RB Dmax KA1H0680B KA1H0680RFB I Ta= Vfb Idelay Ta= Vfb = Sync & S/S=GND SS Vref Ta=25 C Vref + Max ...

Page 5

... Figure 1. Operating Frequency Fig.3 Operating Current 1.2 1.15 1.1 1.05 I Iop OP 1 0.95 0.9 0.85 0.8 - Temperature [ Figure 3. Operating Supply Current Fig.5 Start up Current 1.5 1.3 1 Istart 0.9 0.7 0.5 - Temperature [ Figure 5. Start up Current KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB 1.2 1.15 1.1 1.05 Ifb 1 0.95 0.9 0.85 0.8 -25 75 100 125 150 ] C Figure 2. Feedback Source Current 1.1 1.05 I over Ipeak 1 0.95 0.9 0.85 0.8 100 125 150 - 1.15 1.1 1.05 V Vstart th(H) 1 ...

Page 6

... KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB Typical Performance Characteristics (These characteristic graphs are normalized at Ta=25 C) Fig.7 Stop Threshold Voltage 1.15 1.1 1.05 V Vstop th(L) 1 0.95 0.9 0.85 - Temperature [ Figure 7. Stop Threshold Voltage Fig.9 Vcc Zener Voltage 1.2 1.15 1.1 1. 0.95 0.9 0.85 0.8 - Temperature [ Figure 9. V Zener Voltage CC Fig.11 Shutdown Delay Current 1.2 1.15 1.1 1.05 Idelay 1 0.95 0.9 0.85 0.8 -25 ...

Page 7

... Typical Performance Characteristics (These characteristic grahps are normalized at Ta=25 C) Fig.13 Soft Start Voltage 1.15 1.1 1.05 Vss 1 0.95 0.9 0.85 - Temperature [ Figure 13. Soft Start Voltage KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB (Continued) 2.5 2 1.5 Rdson ( ) 1 0.5 0 100 125 150 ] C Figure 14. Static Drain-Source on Resistance Fig.14 Drain Source Turn-on Resistance - 100 125 150 ...

Page 8

... KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB Package Dimensions 8 TO-3P-5L ...

Page 9

... Package Dimensions (Continued) TO-3P-5L (Forming) KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB 9 ...

Page 10

... KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB Package Dimensions (Continued) 10 TO-3PF-5L ...

Page 11

... Package Dimensions (Continued) TO-3PF-5L(Forming) KA1M0680B/KA1M0680RB/KA1H0680B/KA1H0680RFB 11 ...

Page 12

... TO-3P-5L(Forming) KA1M0680RB-TU TO-3P-5L KA1M0680RB-YDTU TO-3P-5L(Forming) KA1H0680B-TU TO-3P-5L KA1H0680B-YDTU TO-3P-5L(Forming) KA1H0680RFB-TU TO-3PF-5L KA1H0680RFB-YDTU TO-3PF-5L(Forming Non Forming Type YDTU : Forming Type 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 ...

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