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SPS

KA1M0880

#3 V

32V

2.5R

1mA

0.1V

OVER VOLTAGE S/D

7.5V

25V

Thermal S/D

Power on reset

L.E.B

OSC

Vref

Internal

bias

Good

logic

SFET

#1 DRAIN

#2 GND

#4 FB

#5 Soft Start

SPS

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 IC.
Included 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, and temperature compensated precision
current sources for loop compensation and fault protection
circuitry. Compared to discrete MOSFET and controller or
RCC switching 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 either
a flyback converter or a forward converter.

FEATURES

Precision fixed operating frequency (70kHz)

Pulse by pulse over current limiting

Over Current Protection

Over Voltage Protection (Min. 23V)

Internal thermal shutdown function

Under voltage lockout

Internal high voltage sense FET

Latch up mode

Soft start

ORDERING INFORMATION

Device

Package

Operating Temperature

KA1M0880

TO-3P-5L

C to +85

TO-3P-5L

1.DRAIN 2. GND 3. V

4. FB 5. S/S

BLOCK DIAGRAM

Rev. B

1999 Fairchild Semiconductor Corporation

KA1M0880

SPS

ABSOLUTE MAXIMUM RATINGS

NOTES:
1.

Tj=25

C to 150

Repetitive rating: Pulse width limited by maximum junction temperature

L=24mH, V

=50V, R

=25

, starting Tj=25

Characteristic

Symbol

Value

Unit

Drain-source (GND) voltage

(1)

DSS

800

Drain-Gate voltage (R

=1M

)

DGR

800

Gate-source (GND) voltage

Drain current pulsed

(2)

32.0

Single pulsed avalanche energy

(3)

810

Avalanche current

(4)

Continuous drain current (T

=25

8.0

Continuous drain current (T

=100

5.6

Supply voltage

Analog input voltage range

0.3 to V

Total power dissipation

(watt H/S)

190

Derating

1.54

Operating temperature

OPR

25 to +85

Storage temperature

STG

55 to +150

SPS

KA1M0880

NOTE: Pulse test: Pulse width

300

S, duty cycle

ELECTRICAL CHARACTERISTICS (SFET part)

(Ta=25

C unless otherwise specified)

Characteristic

Symbol

Test condition

Min.

Typ.

Max.

Unit

Drain-source breakdown voltage

DSS

=0V, I

=50

800

Zero gate voltage drain current

DSS

=Max., Rating, V

=0V

=0.8Max., Rating,

=0V, T

=125

200

Static drain-source on resistance

(note)

DS(ON)

=10V, I

=5.0A

1.2

1.5

Forward transconductance

(note)

gfs

=15V, I

=5.0A

1.5

2.5

mho

Input capacitance

Ciss

=0V, V

=25V,

f=1MHz

2460

Output capacitance

Coss

210

Reverse transfer capacitance

Crss

Turn on delay time

td(on)

=0.5BV

DSS

, I

=8.0A

(MOSFET switching
time are essentially
independent of
operating temperature)

Rise time

200

Turn off delay time

td(off)

150

450

Fall time

150

Total gate charge
(gate-source+gate-drain)

=10V, I

=8.0A,

=0.5BV

DSS

(MOSFET

switching time are
essentially independent of
operating temperature)

150

Gate-source charge

Qgs

Gate-drain (Miller) charge

Qgd

KA1M0880

SPS

NOTES:
1.

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

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

ELECTRICAL CHARACTERISTICS (Control part)

(Ta=25

C unless otherwise specified)

Characteristic

Symbol

Test condition

Min.

Typ.

Max.

Unit

REFERENCE SECTION

Output voltage

(1)

Vref

Ta=25

4.80

5.00

5.20

Temperature Stability

(1)(2)

Vref/

+85

0.3

0.6

mV/

OSCILLATOR SECTION

Initial accuracy

OSC

Ta=25

kHz

Frequency change with temperature

(2)

+85

PWM SECTION

Maximum duty cycle

Dmax

FEEDBACK SECTION

Feedback source current

Ta=25

C, 0V

Vfb

0.7

0.9

1.1

Shutdown delay current

Idelay

Ta=25

C, 5V

Vfb

4.0

5.0

6.0

OVER CURRENT PROTECTION SECTION

Over current protection

(max)

Max. inductor current

4.40

5.00

5.60

UVLO SECTION

Start threshold voltage

Vth(H)

Minimum operating voltage

Vth(L)

After turn on

TOTAL STANDBY CURRENT SECTION

Start current

=14V

0.1

0.3

0.45

Operating supply current
(control part only)

OPR

Ta=25

zener voltage

=20mA

32.5

SHUTDOWN SECTION

Shutdown Feedback voltage

6.9

7.5

8.1

Thermal shutdown temperature (Tj)

(1)

140

160

Over voltage protection voltage

OVP

TRADEMARKS

ACExTM
CoolFETTM
CROSSVOLTTM
E

CMOS

FACTTM
FACT Quiet SeriesTM
FAST

FASTrTM
GTOTM
HiSeCTM

The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is
not intended to be an exhaustive list of all such trademarks.

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 FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:

ISOPLANARTM
MICROWIRETM
POPTM
PowerTrenchTM
QSTM
Quiet SeriesTM
SuperSOTTM-3
SuperSOTTM-6
SuperSOTTM-8
TinyLogicTM

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, or (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 significant injury to the
user.

2. A critical component is 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.

PRODUCT STATUS DEFINITIONS

Definition of Terms

Datasheet Identification

Product Status

Definition

Advance Information

Preliminary

No Identification Needed

Obsolete

This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.

This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.

This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.

This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.

Formative or
In Design

First Production

Full Production

Not In Production

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.

UHCTM
VCXTM

Part Number KA1M0880

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