SD6109

SD6109

VOLTAGE MODE PWM POWER SUPPLY WITH BUILT-IN SUPERVISOR, PROTECTION AND REGULATION FOR PCs

DESCRIPTION

The SD6109 is a power management IC for computers.

It integrates various monitoring functions and protections, such as

AC fail detection, over power protection, negative voltage protection,

over/under voltage protection and provides power down signal for

PG.

Built-in high precision oscillator provides accurate protection and

delay time for monitoring. And internal regulators TL431 are used for

stable output 3.3V and 5V, with few peripheral components.

Built-in soft-start decreases stress of transformer against saturation.

SD6109 used for pull-push or half-bridge power system with high

efficiency and stability.

FEATURES

* Advanced Bi-CMOS process.

*4KV HBM ESD protection

* Bipolar structure adopted in Shunt regulators TL431, with high

reliability

* Over voltage protection for 3.3V/5V/12V

* Under voltage protection for 3.3V/±5V/±12V

* Over power protection

* Short circuit protection

* AC-input under voltage protection

* PG Circuit

* PSON for remote control

* Delay time for PSON or PG signals

* Two bypass regulators for 3.3V and 5V- voltage stability

* Soft start and maximum 93% duty cycle

DIP-20-300-2.54

APPLICATIONS

* Switching mode power supply for

computers.

ORDERING INFORMATION

Part No. Package Marking

SD6109 DIP-20-300-2.54 SD6109

HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.1 2009.02.23 Http://www.silan.com.cn Page 1 of 11

SD6109

BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATING

Characteristics Symbol Rating Unit

Supply Voltage(pin 20) VCC 12 V

Regulator Output At Pins FB1, FB2 Pins VFB 16 V

Output Current At Pins PG, FB1, FB2 Pins IOUT 30 mA

Power Dissipation(Tamb=25°C) PD 1.5 W

Power Dissipation(Tamb=90°C) PD 0.5 W

Thermal Resistance, Junction-To-Air RθJA 82.5 °C/W

Operating Temperature Range Tamb -30 ~ +125 °C

Storage Temperature Range Tstg -55~+155 °C


SD6109


ELECTRICAL CHARACTERISTICS (Unless otherwise stated, VCC=5V, Tamb=25°C)

Characteristics Symbol Test condition Min. Typ. Max. Unit

Supply Voltage VCC All functions are normal. 4.5 5.0 7.0 V

Supply Current ICC PG High -- 5 10 mA

Over-Voltage Protection 3.3V VOVP1 - 3.9 4.1 4.3 V

Over-Voltage Protection 5V VOVP2 - 5.8 6.1 6.5 V

Over-Voltage Protection 12V VOVP3 - 13.9 14.5 14.9 V

Under-Voltage Protection 3.3V VUVP1 - 2.0 2.6 2.8 V

Under-Voltage Protection 5V VUVP2 - 3.0 3.6 3.9 V

Under-Voltage Protection 12V VUVP3 - 6.0 7.2 8.0 V

Under-Voltage Sense 3.3V For PG Low VUVS1 - 2.5 2.8 3.0 V

Under-Voltage Sense 5V For PG Low VUVS2 - 4.0 4.3 4.5 V

Under-Voltage Sense 12V For PG Low VUVS3 - 9.4 10.1 10.4 V

Over-Power Protection. VOPPS VUVAC = 1.5V 2.02 2.4 2.66 V

Negative Voltage Protection: Voltage

Level VNVP - 1.9 2.05 2.2 V

Negative Voltage Protection: Source

Current INVP RI = 75KΩ 50 61 72 μA

Timing For Over-Voltage Protection tOVP RI = 75KΩ 0.5 0.7 1.3 ms

Timing For Under-Voltage Protection tUVP RI = 75KΩ 0.9 2.4 3.8 ms

Timing For Under-Voltage Sense for

PG Low tUVS RI = 75KΩ 0.5 1.2 1.9 ms

Timing for Over-Power-Protection tOPP RI = 75KΩ 4.0 7.0 10.0 ms

Timing for Negative Voltage Protection tNVP RI = 75KΩ 4.0 7.0 10.0 ms

Reference Voltage VREF IFB = 0.5mA, Tamb = 25°C 2.475 2.5 2.525 V

Line Regulation REGLI-FB 4 < VFB < 16V - 1 - MV/V

Bypass

Regulator

(FB1,VREF1,

FB2,VREF2) Output Sinking Current

Capability IOUT-FB VFB > 2V 10 - - mA

PG Delay tPG RI = 75KΩ 200 300 400 ms

UVAC Voltage Sense for

PG VUVAC - 0.65 0.7 0.75 V

PG Output Rising Time tR CL = 100pF - 1 - us

PG Falling Time tF CL = 100pF - 300 - ns

PG Output Saturation

Level VOL2 IPG = 5mA - - 0.5 V

PG

PG Leakage Current

Collector ION2 VPG = 5V - - 1 μA

SD6109

Characteristics Symbol Test condition Min. Typ. Max. Unit

PSON Input Threshold

Level VPSON - 1 1.4 2.0 V

Remote Input Driving

Current IPSON - - - 0.5 mA

Timing PSON to On/Off

On

Off (PS-off)

tPSON(ON)

tPSON(OFF)

RI = 75kΩ

20

10

40

20

50

30

ms

Remote

Control

Timing PG low to Power

Off tPSOFF RI = 75kΩ 2 4.8 6.5 ms

Reference Voltage V2.5 - 2.45 2.5 2.55 V

Input Bias Current IIB - - - 0.1 μA

Open-Loop Voltage Gain AVOL - 50 60 - dB

Unity Gain Bandwidth BW - 0.3 1 - MHz

Error

Amplifier

Power Supply Rejection

Ratio PSRR 50 - - dB

Oscillator PWM Frequency FOSC RI = 75kΩ 60 65 70 kHz

Charge Current ISS RI = 75kΩ 4.0 5.7 7.0 μA Soft-Start

Duty Cycle DC - 85 - 93 %

Output Voltage Low VOL Io = 5mA - - 0.5 V

Output Voltage High VOH V12 = 12V 4 - - V PWM

Output Output Impedance of

VOH RO - 1.5 - 3.3 kΩ

PIN CONFIGURATIONS


FB2

VREF2

VREF1

FB1

SD

6109

1 20

2 19

3 18

4

5 16

6 15

7 14

8 13

9 12

10 11

17

SS

PG

OP1

OP2

V12

NVP

UVAC

OPP

V5

V33

PSON

COMP

IN

RI

VCC

GND

SD6109


PIN DESCRIPTIONS

Pin No. Pin Name I/O Description

1 PSON I Remote switch input for CPU or controller. Control the PWM Output.

2 V33 I 3.3V over-voltage/under-voltage control sense input.

3 V5 I 5V over-voltage/under-voltage control sense input.

4 OPP I Over-power sense input.

5 UVAC I AC fail detection.

6 NVP I The protection input for negative output.

7 V12 I 12V over-voltage/under-voltage control sense input.

8 OP2 O The totem-pole output drivers of push-pull PWM. The maximum duty

cycle (OP1 or OP2) is 46%.

9 OP1 O The totem-pole output drivers of push-pull PWM.

10 PG O PG logic output, 0 or 1 (open-collector). PG=1 means that the power is

good for operation.

11 FB2 O Output of second converter regulation loop.

12 VREF2 I Reference comparison input for second converter regulation loop. 2.5V.

13 VREF1 I Reference comparison input for first converter regulation loop. 2.5V.

14 FB1 O Output of first converter regulation loop.

15 GND - Ground.

16 COMP I/O Error amplifier output and the input of the PWM comparator.

17 IN I The negative input of error amplifier. The positive input of error amplifier

is connected to 2.5V reference voltage.

18 SS I/O The soft-start. It is settable through external capacitor. The current

source output at this pin is 5.7uA and the voltage is clamped at 2.5V.

19 RI I Connected to external resistor for the reference setting.

20 VCC - Supply voltage. It is connected to 5V-standby.

SD6109

FUNCTION DESCRIPTION

The SD6109 is a power management IC for computers. It integrates various monitoring functions and protections,

such as AC fail detection, over power protection, negative voltage protection, over/under voltage protection and

provides power down signal for PG. Built-in high precision oscillator provides accurate protection and delay time

for monitoring. And internal regulators TL431 are used for stable output 3.3V and 5V, with few peripheral

components. Built-in soft-start decreases stress of transformer against saturation. SD6109 used for pull-push or

half-bridge power system with high efficiency and stability.

1. TIMING DIAGRAM


SD6109

2. Remote Switch Control (PSON)

The PC generates the remote switch control signal which is connected to PSON. When the control signal is low,

PC power is on. And when the control signal is high, PC power is off..

3. AC Fails Detection (UVAC)

The AC line voltage is coupled from the primary side to the secondary side through the main transformer, and

UVAC is connected to the secondary side by a resistor. When UVAC voltage drops below 0.7V and maintains

this situation over 200us, the PG signal will be pulled low , and it indicates that the AC line is power-down. The

voltage amplitude of the PWM switching signal from the secondary side is proportional to the AC line voltage.

Adjusting the ratio of the voltage divider can set the threshold for the power-down.

4. Over Power Protection (OPP)

The over power protection is designed to detect over power and short circuit.. When the voltage of OPP is higher

than 2.4V and maintain this situation over 7msec, PG will be pulled low and the power outputs will be locked

5. Negative Voltage Protection (NVP)

The negative voltage protection is designed to provide under voltage protection for negative voltage output.

Overload and short circuit can cause under voltage of negative voltage output.. When the voltage of NVP is

higher than 2.1V and this situation exists for longer than 7msec, the power outputs will be off and be locked.

Adjusting the resistor will set the threshold for locking the power outputs off. The threshold is determined by:

VNVP=INVP X (R1+R2)+V-12V

VNVP=INVP X R1+V-5V-0.7V


SD6109

TYPICAL APPLICATION CIRCUIT

Note: The circuit and parameters are for reference only, please set the parameters of the real application

circuit based on the practical test.


SD6109

DETAIL APPLICATION CIRCUIT


D20

FR152

PFC

(SA

7257)

321

PS

ON

+3.3V+5V

POSN

V33

V5

OPP

UVAC

NVP

V12

OP2

OP1

PG FB2

VREF2

VREF1

FB1

GND

COMP

IN

SS

RI

VCC

IC1

SD

6109

R48

75K 1/8W

R49

100 1/8W

+12V

R43

15K

1/8WC

30103Z100V

VP1

10K1/10W

R44

1.5K

1/8W

R45

27K

1/8W

C31

401K50V

R51

47K 1/2W

R50

4.7K 1/8W

PG

+5V

Uvac

-12V

-5V

R46

24K 1/8WR

47

100K 1/8W

D25

IN4148

D19

IN4148

R42

330 1/8W

Q6

2SC

945

C29

1F/50V

D21FR152

D22FR152

Q7

2SC945

C36

473/50V

T2A

TEE119 T8P2T2

D18

FR152

R41

1.5K 1/4W

R60

10 1/2W 5VS

BR59

75K

1/8W

C35473/50V

VR2

1K1/10W

R57

2K 1/8W

R54

24K

1/8W

C32

103Z/100V

Fb1

Vref1

Vref2

Fb2

R56

15.8K 1/8W

C34

104Z/50V

C33

104Z/50V

R55

12K 1/8W

R54

12K 1/8W

R53

6.25K 1/8W

+5V

+12V

AC3P

F15A

/ 630V

VZ1

471

RTH

I SD

15

CX

1471nF/275AC

LF1

9mH

CX2

222nF/275AC

BD

1

KBU

606

C1680

D23

IN4148

D24

IN4148

F/200VC2

680 F/200V

R1330K/1/2W

R2330K/1/2W

ZNR1TVR07241KS

ZNR2TVR07241KS

C6

1F/50V

D3

FR152

R6

39 1/2W

R5

2.2 1/2W

D4 FR

152R

9 39 1/2W

R8

22 1/2W

Q1

2SC3320

Q2

2SC3320

D1

FR107

D2

FR107

C3

105K/250V

ATE

ER35T1

R3

47 5WC

4222Z/1K

V

D5

FR107

R11

4.7 2WR

10100K

1/2W

C7

103V/1KV

T1

R244.7 1/2W

R254.7 1/2W

C15

103Z/200VC

16103Z/200V

C5

1F/50V

L

L3

D11 FR

152S

D3A

F16C20C

FD2A

F16C20C

SD

1A S

BL3040PT

SD

2A S

BL3040PT

Uvac

D9 FR

152SD

2B

SBL3040PT

D10 FR

152FD

2B F16C

20CFD

3B F16C

20CD

12 FR152

D14 IN

4148

SD

1B S

BL3040PT

L10P

L4LT

C19

2200F/16V

C21

680F/16V

C17

2200F/10V L51.6#5.5TSL6

1.6#5.5TS

C18

2200F/10V

C20

2200F/16V

C22

680F/16V

C23

2200F/10V

C24

2200F/10V

L71.6#5TS

R27

47 1WR

28100

1/2W

D15

FR152

R29

270 1W

D13

FR152

D16

FR152

R30

1 2W

R26

150 2W

+12V

+5V

-5V

-12V

+3.3V

R39

15 2W

R38

10 1/8W

C28

104Z/50V

+3.3VS

+5VS

B

Vref1

R35

51 1/8WR

341K 1/8W

R37

620 1/8WC

26103Z/100V

C27

105Z/50VR

361.8K

1/8W

Fb1

C25

0.47F/50V

R32

100 1/8WR

314.7 1/2W

R33

22 1/8W

Q5

KS

A928A

R12

1.5M 1/4W1 2 3 4

5678P

GN

D

VC

C

FBN

CD D D

SD

484

C10

104K/50VC

8104K

/50V

D7 IN

4148R

161K

1/8W

C922 3K/50V

U1

KPC

817

T3ATE

EL19T7P

7

D17

FR152

FD1

SB

302

FD5

SB

302

C14

47F/50V

R18

47 1/8W

R19

510 1/8W

Fb2

C13

104K/ 50V R

2210K

1/8WVref2 R20251K 1/8W

C11

1000F/10V

SGN

D

D26

FR152

R21

24K 1/8W

L1R

4*20

C12

680F/16V

R23

100 1/2W

SD6109

PACKAGE OUTLINE

DIP-20-300-2.54 UNIT: mm

MOS DEVICES OPERATE NOTES:

Electrostatic charges may exist in many things. Please take following preventive measures to prevent effectively

the MOS electric circuit as a result of the damage which is caused by discharge:

The operator must put on wrist strap which should be earthed to against electrostatic.

Equipment cases should be earthed.

All tools used during assembly, including soldering tools and solder baths, must be earthed.

MOS devices should be packed in antistatic/conductive containers for transportation.

Disclaimer:

• Silan reserves the right to make changes to the information herein for the improvement of the design and performance without further notice!

• All semiconductor products malfunction or fail with some probability under special conditions. When using Silan products in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of such Silan products could cause loss of body injury or damage to property.

• Silan will supply the best possible product for customers!


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SD6109