Datasheet KA1M0765R Datasheet (Fairchild Semiconductor)

KA1M0765R/KA1M0765RC

Fairchild Power Switch(FPS)

www.fairchildsemi.com

Features

• Precision fixed operating frequency (67kHz)

• Pulse by pulse current limiting

• Over load protection

• Over voltage protecton (Min. 23V)

• Internal thermal shutdown function

• Under voltage lockout

• Internal high voltage sense FET

•Auto restart

•Soft start

Description

The Fairchild Power Switch(FPS) product family is specially
designed for an off line SMPS with minimal extern al
components. The Fairchild Power Switch(FPS) consist of
high voltage power SenseFET and current mode PWM
controller IC. PWM controller features integrated fixed
frequency oscillator, under voltage lock out, leading edge
blanking, optimized gate turn-on/turn-off driver, thermal
shutdown protection, over voltage protection, temperature
compensated precision current sources for loop
compensation and fault protection circuit. compared to
discrete MOSFE T and PWM controller or R
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.

TO-3P-5L

1

1. DRAIN 2. GND 3. Vcc 4. FB 5. S/S

TO-220-5L

1

solution, a

CC

Internal Block Diagram

#3 V

CC

32V

#5 Soft Start

5V

#4 FB

©2001 Fairchild Semiconductor Corporation

µ

5

7.5V

25V

A

2.5R

1mA

1R

9V

+

−

+

−

Thermal S/D

OVER VOLTAGE S/D

−

+

5V

Vref

OSC

L.E.B

0.1V

Good

logic

S
R

Internal

bias

Q

S
R

Power on res et

SFET

Q

#1 DRAIN

#2 GND

Rev.1.0.2

KA1M0765R/KA1M0765RC

Absolute Maximum Ratings

Characteristic Symbol Value Unit

GS

(2)

(1)

=1MΩ)

C

(3)

=25°C)

Maximum Drain voltage
Drain-Gate voltage (R
Gate-source (GND) voltage
Drain current pulsed
Single pulsed avalanche energy
Continuous drain current (T
Continuous drain current (TC=100°C)
Maximum Supply voltage
Input voltage range

Total power dissipation

Operating ambient temperature
Storage temperature

V

D,MAX

V

DGR

V

GS

I

DM

E

AS

I

D

I

D

V

CC,MAX

V

FB

P

D

Derating

T

A

T

STG

650 V
650 V
±30 V

28.0 A

DC

570 mJ

7.0 A

5.6 A

DC
DC

30 V

−0.3 to V

SD

V

140 W

1.11 W/°C

−25 to +85 °C

−55 to +150 °C

Notes:

1. Tj=25°C to 150°C

2. Repetiti ve rating: Pulse width limi ted by maximum junction temp erature

3. L=24mH, V

=50V, RG=25Ω, starting Tj=25°C

DD

2

KA1M0765R/KA1M0765RC

Electrical Characteristics (SFET part)

(Ta = 25°C unless otherwise specified)

Characteristic Symbol Test condition Min. Typ. Max. Unit

Drain-source breakdown voltage BV

Zero gate voltage drain current I

Static drain-source on resistance
Forward transconductance

(note)

(note)

DSS

DSS

R

DS(ON)

gfs VDS=15V, ID=4.0A 3.0 - - S

Input capacitance Ciss

Reverse transfer capacitance Crss - 120 ­Turn on delay time t

d(on)

Rise time tr - 55 ­Turn off delay time t

d(off)

Fall time tf - 50 ­Total gate charge

(gate-source+gate-drain)

Qg

Gate source charge Qgs - 9.3 ­Gate drain (Miller) charge Qgd - 29.3 -

VGS=0V, ID=50µA 650 - - V
VDS=Max., Rating,

V

=0V

GS

=0.8Max., Rating,

V

DS

V

=0V, TC=125°C

GS

--50µA

- - 200 mA

VGS=10V, ID=4.0A - 1.25 1.6 W

V

=0V, VDS=25V,

GS

- 1600 -

f=1MHz
VDD=0.5BV

DSS

, ID=7.0A

-25­(MOSFET switching
time are essentially
independent of

-80­operating temperature)

=10V, ID=7.0A,

V
V

GS
DS

=0.5BV

(MOSFET

DSS

--72
switching time are

essentially independent of
operating temperature)

pFOutput capacitance Coss - 310 -

nS

nC

Note:

Pulse test: Pulse width <

1

S

--- -=

R

300µS, duty < 2%

3

KA1M0765R/KA1M0765RC

Electrical Charcteristics (CONTROL part)

(Ta = 25°C unless otherwise specified)

Characteristic Symbol Test condition Min. Typ. Max. Unit

UVLO SECTION

Start threshold voltage V
Stop threshold voltage V

START

STOP

After turn on 9 10 11 V

OSCILLATOR SECTION

Initial accuracy F
Frequency change with temperature

(2)

OSC

∆F/∆T −25°C ≤ Ta ≤ +85°C-±5 ±10 %

Ta=25°C616773kHz

Maximum duty cycle Dmax - 74 77 80 %

FEEDBACK SECTION

Feedback source current I
Shutdown Feedback voltage V

FB

SD

Ta=25°C, 0V ≤Vfb ≤ 3V 0.7 0.9 1.1 mA

Shutdown delay current Idelay Ta=25°C, 5V ≤ Vfb ≤ V

SOFT START SECTION

Soft Start Voltage V
Soft Start Current I

SS

SS

V

FB

Sync & S/S=GND 0.8 1.0 1.2 mA

REFERENCE SECTION

Output voltage
Temperature Stability

(1)

(1)(2)

Vref Ta = 25°C 4.80 5.00 5.20 V

Vref/∆T −25°C ≤ Ta ≤ +85°C-0.30.6mV/°C

CURRENT LIMIT (SELF-PROTECTION) SECTION

Peak Current Limit I

OVER

Max. inductor current 4.40 5.00 5.60 A

PROTECTION SECTION

Thermal shutdown temperature (Tj)
Over voltage protection voltage V

(1)

T

SD

OVP

TOTAL DEVICE SECTION

Start Up current I
Operating supply current

(control part only)
V

zener voltage V

CC

START

I

OP

Z

VCC=14V 0.1 0.3 0.4 mA
Ta=25°C 6 12 18 mA
ICC=20mA 30 32.5 35 V

-141516V

-6.97.58.1V

4.0 5.0 6.0 µA

SD

=2V 4.7 5.0 5.3 V

- 140 160 - °C

-232528V

Note:

1. These parameters, although guaranteed, are not 100% tested in production

2. These parameters, although guaranteed, are tested in EDS(water test) process

3.The amplitude of the sync. pulse is recommended to be between 2V and 3V for stable sync. function.

4

Typical Performance Characteristics

(These characteristic graphs are normalized at Ta = 25°C)

KA1M0765R/KA1M0765RC

Fig.1 O per at ing Fr eque nc y

1.2

1.15

1.1

1.05

Fosc

1

0.95

0.9

0.85

0.8

-25 0 25 50 75 100 125 150

Temperature [°C] Temperature [°C]

Figure 1. Operating Frequency Figure 2. Feedback Source Current

Fig.3 Operating Cur rent

1

-25 0 25 50 75 100 125 150

Temperature [

Iop

l

OP

1.2

1.15

1.1

1.05

0.95

0.9

0.85

0.8

Fig.2 Feedback Sourc e Current

1.2

1.15

1.1

1.05

Ifb

1

IFB

0.95

0.9

0.85

0.8

-25 0 25 50 75 100 125 150

1.1

1.05

I

over

Ipeak

0.95

0.9

0.85

0.8

] Temperature [

C

°

Fig.4 Max Inductor Current

1

-25 0 25 50 75 100 125 150

]

C

°

Figure 3. Operating Supply Current Figure 4. Peak Current Limit

I

ST

Istart

1.5

1.3

1.1

0.9

0.7

0.5

Fig.5 Start up Current

-25 0 25 50 75 100 125 150

V

th(H)

Vstart

Fig.6 Star t Threshold Voltage

1.15

1.1

1.05
1

0.95

0.9

0.85

-25 0 25 50 75 100 125 150

Temperature [°

Figure 5. Start up Current Figure 6. Start Threshold Voltage

]Temperature [°C]

C

5

KA1M0765R/KA1M0765RC

Typical Performance Characteristics

(Continued)

(These characteristic graphs are normalized at Ta = 25°C)

Fig.7 Stop Threshold Voltage

1.15

1.1

1.05

V

th(L)

1

Vstop

0.95

0.9

0.85

-25 0 25 50 75 100 125 150

Temperature [°C] Temperature [°C]

Figure 7. Stop Threshold Voltage Figure 8. Maximum Duty Cycle

1.2

1.15

1.1

1.05

Vz

0.95

0.9

0.85

0.8

Fig.9 V c c Zener Voltage

1

-25 0 25 50 75 100 125 150

Temperature [°

] Temperature [°C]

C

F i g .8 Maxi mum D u ty Cycl e

1.15

1.1

1.05
1

Dmax

0.95

0.9

0.85

-25 0 25 50 75 100 125 150

Fig.10 Shut do wn Feedback Voltage

1.15

1.1

1.05

Vsd

1

0.95

0.9

0.85

-25 0 25 50 75 100 125 150

Idelay

Figure 9. V

Fig.11 Shut do wn Delay Current

1.2

1.15

1.1

1.05
1

0.95

0.9

0.85

0.8

-25 0 25 50 75 100 125 150

Zener Voltage Figure 10. Shutdown Feedback Voltage

CC

Fig.12 Over Voltage Prot ec tion

1.15

1.1

1.05

Vovp

1

0.95

0.9

0.85

-25 0 25 50 75 100 125 150

Temperature [°

]Temperature [°C]

C

Figure 11. Shutdown Delay Current Figure 12. Over Voltage Protection

6

KA1M0765R/KA1M0765RC

Typical Performance Characteristics

(Continued)

(These characteristic graphs are normalized at Ta = 25°C)

1.15

Fig.13 Soft Start Voltage

1.1

1.05

Vss

1

0.95

0.9

0.85

-25 0 25 50 75 100 125 150

Figure13. Soft Start Voltage

Fig.14 Drain Sour c e Turn-on

Resistance

2.5
2

1.5

)

(

Rdson

1

0.5
0

-25 0 25 50 75 100 125 150

Figure 14. Static Drain-Source on Resistance

7

KA1M0765R/KA1M0765RC

Package Dimensions

TO-3P-5L

8

KA1M0765R/KA1M0765RC

Package Dimensions

TO-3P-5L (Forming)

(Continued)

9

KA1M0765R/KA1M0765RC

Package Dimensions

(Continued)

TO-220-5L

10

KA1M0765R/KA1M0765RC

Package Dimensions

(Continued)

TO-220-5L(Forming)

11

KA1M0765R/KA1M0765RC

Ordering Information

Product Number Package Rating Fosc

KA1M0765R-TU TO-3P-5L
KA1M0765R-YDTU TO-3P-5L(Forming)

650V, 7A 67kHz

KA1M0765RC-TU TO-220-5L
KA1M0765RC-YDTU TO-220-5L(Forming)

TU : Non Forming Type
YDTU : Forming Type

650V, 7A 67kHz

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D 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 IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.

LIFE SUPPORT POL I CY

FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
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.

www.fairchildsemi.com

2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .

10/17/01 0.0m 001

 2001 Fairchild Semiconductor Corporation

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