KA2S0880B-TU [FAIRCHILD]

Fairchild Power Switch(SPS); 飞兆功率开关（ SPS ）


型号：	KA2S0880B-TU
厂家：	FAIRCHILD SEMICONDUCTOR
描述：	Fairchild Power Switch(SPS) 飞兆功率开关（ SPS ）稳压器开关式稳压器或控制器电源电路开关式控制器局域网
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www.fairchildsemi.com

KA2S0880B

Fairchild Power Switch(SPS)

Features

Description

• Wide operating frequency range up to 150KHz

• 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

• External sync terminal

• Latch up Mode

The SPS product family is specially designed for an off-line

SMPS with minimal external components. The SPS consist of

high voltage power SenseFET and current mode PWM Control-

ler IC. PWM controller features integrated fixed oscillator,

under voltage lockout, leading edge blanking, optimized gate

turn-on/turn-off driver, thermal shut down protection, over volt-

age protection, temperature compensated precision current

sources for loop compensation and fault protection circuit.

Compared to discrete MOSFET and controller or RCC switch-

ing converter solution, a SPS 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 monitor power supply.

TO-3P-5L

1. DRAIN 2. GND 3. V

4. FB 5. Sync

Internal Block Diagram

#3 V

#1 DRAIN

32V

Vref

Internal

bias

SFET

Good

logic

#5 Sync

#4 FB

−

OSC

6.4V

−

L.E.B

0.1V

2.5R

2µA

1mA

#2 GND

−

7.5V

25V

Thermal S/D

OVER VOLTAGE S/D

Power on reset

−

Rev.1.0.1

KA2S0880B

Absolute Maximum Ratings

Parameter

Maximum Drain voltage ⁽¹⁾

Symbol

Value

800

Unit

D,MAX

Drain-Gate voltage (R =1MΩ)

DGR

800

Gate-source (GND) voltage

Drain current pulsed ⁽²⁾

Single pulsed avalanche energy ⁽³⁾

Avalanche current ⁽⁴⁾

±30

32.0

810

Continuous drain current (T =25°C)

8.0

Continuous drain current (T =100°C)

5.6

Maximum Supply voltage

Input voltage range

CC,MAX

−0.3 to V

190

W/°C

°C

Total power dissipation

Derating

1.54

Operating ambient temperature

Storage temperature

−25 to +85

−55 to +150

°C

STG

Notes:

1. Tj=25°C to 150°C

2. Repetitive rating: Pulse width limited by maximum junction temperature

3. L=24mH, V =50V, R =25Ω, starting Tj=25°C

4. L=13µH, starting Tj=25°C

KA2S0880B

Electrical Characteristics (SFET part)

(Ta=25°C unless otherwise specified)

Parameter

Symbol

Condition

Min.

Typ. Max. Unit

Drain-source breakdown voltage

=0V, I =50µA

800

DSS

=Max., Rating,

=0V

µA

Zero gate voltage drain current

DSS

=0.8Max., Rating,

200

µA

=0V, T =125°C

Static drain-source on resistance ^(note)

Forward transconductance ^(note)

Input capacitance

=10V, I =5.0A

1.2

2.5

2460

210

1.5

Ω

DS(ON)

gfs

=15V, I =5.0A

1.5

Ciss

=0V, V =25V,

GS DS

Output capacitance

Reverse transfer capacitance

Turn on delay time

Coss

Crss

f=1MHz

td(on)

=0.5BV

, I =8.0A

200

450

150

DSS

(MOSFET switching

time are essentially

independent of

Rise time

Turn off delay time

td(off)

150

Fall time

operating temperature)

Total gate charge

(gate-source+gate-drain)

=10V, I =8.0A,

=0.5BV (MOSFET

DSS

150

switching time are

essentially independent of

operating temperature)

Gate-source charge

Qgs

Qgd

Gate-drain (Miller) charge

Note:

Pulse test: Pulse width ≤ 300µS, duty cycle ≤ 2%

S = ---

KA2S0880B

Electrical Characteristics (CONTROL part)

(Ta=25°C unless otherwise specified)

Parameter

UVLO SECTION

Symbol

Condition

Min.

Typ. Max.

Unit

Start threshold voltage

Stop threshold voltage

OSCILLATOR SECTION

Initial accuracy

START

After turn on

STOP

OSC

Ta=25°C

±5

±10

kHz

Frequency change with temperature ⁽²⁾

∆F/∆T

−25°C≤Ta≤+85°C

Maximum duty cycle

Dmax

FEEDBACK SECTION

Feedback source current

Shutdown Feedback voltage

Shutdown delay current

SYNC. & SOFT START SECTION

Soft start voltage

Ta=25°C, Vfb=GND

0.7

6.9

1.4

0.9

7.5

1.8

1.1

8.1

2.2

Idelay

Ta=25°C, 5V≤Vfb≤V

µA

V =2V

4.7

0.8

6.0

5.0

1.0

6.4

5.3

1.2

6.8

Soft start current

Sync & S/S=GND

Vfb=5V

Sync threshold voltage ⁽³⁾

REFERENCE SECTION

Output voltage ⁽¹⁾

SYTH

Vref

Ta=25°C

4.80

5.00

0.3

5.20

0.6

Temperature Stability ⁽¹⁾⁽²⁾

Vref/∆T

−25°C≤Ta≤+85°C

mV/°C

CURRENT LIMIT (SELF-PROTECTION) SECTION

Peak Current Limit

Max. inductor current

4.40

5.00

5.60

OVER

PROTECTION SECTION

Thermal shutdown temperature (Tj) ⁽¹⁾

Over voltage protection voltage

TOTAL DEVICE SECTION

Start Up current

140

160

°C

OVP

=14V

0.1

0.3

0.55

START

Operating supply current

(control part only)

Ta=25°C

zener voltage

=20mA

32.5

Notes:

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

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

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

KA2S0880B

Typical Performance Characteristics

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

Fig.2 Feedback Source Current

Fig.1 Operating Frequency

1.2

1.15

1.1

1.2

1.15

1.1

1.05

Ifb

0.95

0.9

Fosc

0.95

0.9

0.85

0.8

0.85

0.8

-25

75 100 125 150

- 25

25 50 75 100 125 150

Temperature [°C]

Figure 1. Operating Frequency

Figure 2. Feedback Source Current

Fig.3 Operating Current

Fig.4 Max Inductor Current

1.1

1.05

1.2

1.15

1.1

over

Ipeak 1

0.95

0.9

1.05

Iop

0.95

0.9

0.85

0.8

0.85

0.8

-25

25 50

75 100 125 150

-25

25 50 75 100 125 150

Temperature [°C]

Figure 3. Operating Supply Current

Figure 4. Peak Current Limit

Fig.5 Start up Current

1.5

Fig.6 Start Threshold Voltage

1.15

1.1

1.3

1.1

0.9

0.7

0.5

1.05

th(H)

Vstart

Istart

0.95

0.9

0.85

-25

25 50 75 100 125 150

-25

25 50 75 100 125 150

Temperature [°C]

Figure 5. Start up Current

Figure 6. Start Threshold Voltage

KA2S0880B

Typical Performance Characteristics ^(Continued)

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

Fig.7 Stop Threshold Voltage

1.15

Fig.8 Maximum DutyCycle

1.15

1.1

1.05

th(L)

Vstop 1

Dmax

0.95

0.9

0.95

0.9

0.85

-25

25 50 75 100 125 150

-25

25 50 75 100 125 150

Temperature [°C]

Figure 7. Stop Threshold Voltage

Figure 8. Maximum Duty Cycle

Fig.10 Shutdown Feedback Voltage

Fig.9 Vcc Zener Voltage

1.2

1.15

1.1

1.05

0.95

0.9

1.1

1.05

Vsd

0.95

0.9

0.85

0.8

0.85

-25

75 100 125 150

-25

75 100 125 150

Temperature [°C]

Figure 9. V

Zener Voltage

Figure 10. Shutdown Feedback Voltage

Fig.11 Shutdown DelayCurrent

Fig.12 Over Voltage Protection

1.15

1.2

1.15

1.1

1.05

Idelay

Vovp

0.95

0.9

0.85

0.8

0.95

0.9

0.85

-25

25 50

75 100 125 150

-25

25 50 75 100 125 150

Temperature [°C]

Figure 11. Shutdown Delay Current

Figure 12. Over Voltage Protection

KA2S0880B

Typical Performance Characteristics ^(Continued)

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

Fig.13 Soft Start Voltage

1.15

Fig.14 Drain Source Turn-on

Resistance

2.5

1.1

1.05

1.5

Vss

(

)

Rdson

0.95

0.9

0.5

0.85

-25

75 100 125 150

-25

25 50 75 100 125 150

Temperature [°C]

Figure 13. Soft Start Voltage

Figure 14. Static Drain-Source on Resistance

KA2S0880B

Package Dimensions

TO-3P-5L

KA2S0880B

Package Dimensions ^(Continued)

TO-3P-5L (Forming)

KA2S0880B

Ordering Information

Product Number

Package

TO-3P-5L

Rating

Operating Temperature

KA2S0880B-TU

800V,8A

-25°C to +85°C

KA2S0880B-YDTU TO-3P-5L(Forming)

TU : Non Forming Type

YDTU : Forming Type

KA2S0880B

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

2/5/01 0.0m 001

Stock#DSxxxxxxxx

2001 Fairchild Semiconductor Corporation

KA2S0880B-TU [FAIRCHILD]

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