3515A-S14-R [UTC]

PC POWER SUPPLY SUPERVISOR; PC电源监控器


型号：	3515A-S14-R
厂家：	Unisonic Technologies
描述：	PC POWER SUPPLY SUPERVISOR PC电源监控器电源电路电源管理电路监控 PC
文件：	总9页 (文件大小：235K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

3515A

CMOS IC

PC POWER SUPPLY

SUPERVISOR

ꢀ

DESCRIPTION

SOP-14

The UTC 3515A is specially designed for switching power supply

system. it provides protection circuits, power good output (PGO)

indicator, fault protection output (FPOB) and a PSONB control.

The protection circuits include over voltage protection (OVP),

under voltage protection (UVP) and over current protection (OCP)

monitoring for system voltages and currents.

DIP-14

When 3.3V, 5V or 12V voltage is decreasing to 2.68V, 4.3V and

9.9V respectively, the under voltage protection (UVP) function will be

enabled. FPOB will be set to high to turn off the PWM controller IC.

Toggling the PSONB from low to high will reset the fault protection

latch.

* Pb-free plating product number: 3515AL

The voltage difference across external current shunt is used for

OCP functions. An external resistor can be used to adjust protection

threshold.

The power supply is turned on after 38mS delay time when

PSONB signal is set from high to low. To turn off power supply,

PSONB signal is set from low to high with the delay time 38mS. The

PGI circuitry provides a power-down warning signal for PGO. When

PGI input is lower than the internal 1.20V reference voltage, PGO

signal is pulled low.

ꢀ

FEATURES

* OVP/UVP monitors 3.3V, 5V, 12V input voltage level.

* OCP monitors I_S33, I_S5, I_S12input current sense.

* Fault protection output (FPOB) with Open Drain Output stage.

* Power good output (PGO) with Open Drain Output stage.

* 38ms de-bounce time for PSONB input signal.

* 300ms time delay from PGI to PGO.

* 2.4ms time delay for PSONB to turn off FPOB.

ꢀ ORDERING INFORMATION

Ordering Number

Package

Packing

Normal

Lead Free Plating

3515AL-D14-T

3515AL-S14-R

3515AL-S14-T

3515A-D14-T

3515A-S14-R

3515A-S14-T

DIP-14

SOP-14

Tube

Tape Reel

Tube

3515AL-D14-T

(1)Packing Type

(2)Package Type

(3)Lead Plating

(1) R: Tape Reel, T: Tube

(2) D14: DIP-14, S14: SOP-14

(3) L: Lead Free Plating, Blank: Pb/Sn

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CMOS IC

ꢀ

PIN ASSIGNMENT

PGI

PGO

GND

VDD

FPOB

V₅

PSONB

I_S12AB

V₃₃

V_12A

IS33

I_S5

V_12B

ꢀ

FUNCTION DESCRIPTION

PGI

PSONB

UV&OC Protection OV Protection

FPOB

PGO

PGI<1.2V

PGI>1.2V

Yes

Note: FPOB=L means: fault is not latched. FPOB=H means: fault is latched

PGO=L means: fault. PGO=H means: No fault

X=do not care

ꢀ

PIN DESCRIPTIONS

PIN NO. PIN NAME

TYPE

Input

DESCRIPTION

Power Good Input. For ATX SMPS, it detects AC line voltage through the

main transformer.

PGI

GND

FPOB

Supply

Output

Ground

Fault Protection Output. Output signal to control the primary PWM IC through

an opto-coupler. When FPOB is low, the PWM IC is enabled.

Remote On/Off logic input from CPU or main-board. The power supply will

be turned on/off after 38mS delay.

PSONB

I_S12AB

Input

12V _ABover current protection.

Reference setting. One external resistor Ri connected between RI and GND

pin will determine a reference current, I_REF= 1.20/Ri, for OCP programming.

12V over/under voltage protection.

V_12B

I_S5

Input

Supply

5V over current protection.

I_S33

V_12A

V₃₃

V₅

3.3V over current protection

12V over/under voltage protection.

3.3V over/under voltage protection

5V over/under voltage protection.

V_DD

Power supply.

Power good logic output, 0 or 1(open-drain). Power good=1 means that the

power supply is good for operation. The power good delay is 300mS.

PGO

Output

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BLOCK DIAGRAM

V_cc

PGO

PGI

225ms

delay

clr

debounce

Bandgap

Reference

_REF=1.2V

V12A

IS33

REF*8

73μs

debounce

FPOB

R Q

S Q

VS33

Internal

Power

12A

Power On Reset

PWR

IS12AB

V_CCI=3.6V

REF*8

2.4ms

delay

38ms

debounce

PSONB

VS12A

75ms/ 300ms

delay

V12A

PWR

OSC

VS12B

CLK

V12A

IS5

V_12A

IREF*8

VS5

V_REF=1.2V

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ꢀ

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

RATINGS

-0.3 ~ 16

UNIT

Supply Voltage, V_DD, V_12A

Input Voltage

V₅,V₃₃, PSONB, I_S5, I_S33

-0.3 ~ 7

V_IN

I_S12AB, V_12B

PGI

-0.3 ~ 16

-0.3 ~ V_DD+0.3

-0.3 ~ 7

FPOB

PGO

Output Voltage

V_OUT

-0.3 ~ 7

Operating Temperature

Storage Temperature

T_OPR

T_STG

-40 ~ +125

-55 ~ +150

℃

Note Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ꢀ

RECOMMENDED OPERATING CONDITIONS

PARAMETER

SYMBOL

V_DD

MIN

TYP

MAX

UNIT

Supply Voltage

VCC2

9.5

V₅,V₃₃,PGI ,PSONB

V_12A, V_12B

FPOB

Input Voltage

V_IN

Output Voltage

V_OUT

PGO

FPOB

Output Sink Current

I_O(SINK)

PGO

RI Output Current

I_O(RI)

t_R

Supply Voltage Rising Time (V_DD

)

ꢀ

ELECTRICAL CHARACTERISTICS (Ta=25℃and V_DD=5V and V_12A=12V)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

Over Voltage Detection

V_12A,V_12B

V₅

13.2 13.8 14.4

Over Voltage Threshold

5.7

3.7

6.1

3.9

6.5

4.1

0.3

0.7

V₃₃

I_SINK=10mA

Low Level Output Voltage (FPOB)

V_OL

I_SINK=30mA

V_(FPOB)=5V

Output Leakage Current (FPOB)

PSONB

I_LEAK

High-Level Input Voltage

Low-Level Input Voltage

Input Pull-up Current

PGI and PGO

V_IH

V_IL

I_IN

0.8

PSONB=0V

120

V_12A,V_12B

V₅

9.5

4.1

10.5

Under Voltage Threshold

4.30 4.47

V₃₃

2.55 2.69 2.83

Input Threshold Voltage (PGI)

Low Level Output Voltage (PGO)

Output Leakage Current (PGO)

V_I(THD)

V_OL

1.16 1.20 1.24

I_SINK=10mA

PGO=5V

0.4

I_LEAK

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ꢀ

ELECTRICAL CHARACTERISTICS (Cont.)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

SWITCHING CHARACTERISTICS

PSONB ON(PSONB Low to FPOB Low)

PSONB OFF(PSONB Hi to PGO Low)

PGI to PGO Delay Time

T_{(PSONB ON)}

T_{(PSONB OFF)}

T_PG

DD=5V

µs

DD=5V

200

2.0

300

2.4

490

Timing PGO Low to FPOB high

T_PSOFF

T_UVP1

FPOB=Low & PGI > 1.2V

FPOB=Low & PGI < 1.2V

122

488

120

UVD/OCD Turn on Delay Time

T_UVP2

260

300

Noise Deglitch Time

Noise Deglitch Time for Latch

TOTAL DEVICE

t_g1

t_g2

µs

Low Voltage

V_DD

I_DD

3.0

Supply Current

PSONB=5V

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APPLICATION INFORMATION

5VSB

3515A

PGI

PGO

0.01μF

GND

VDD

10KΩ

FPOB

300

PSONB

V33

+3.3V

0.01μF

S12AB

IS12AB

12A

S33

I_S33

12V

12B

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APPLICATION INFORMATION

R_L

V₅

I₅

8×I_REF

(I_REF=V_REF/R )

R_L: inductor DC resistor

I_fIL* R_L＞(8 * I_REF) * R, then OCP active.

And the capacitor C is used to avoide power on fail or dynamic load fa.ilWe suggest C > 1µF.

EX：How to select the resistor of R? Assume R_I=30KΩ, R_L=3mΩ, OCP=20A。

Sol：R = ( I_L* R_L) / ( 8 * I_REF

)

= ( 20A * 3mΩ) / { 8 * ( 1.2V / 30KΩ)}

= 187.5Ω

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TYPICAL TIMMING DIAGRAM

1) PGI (UNDER-VOLTAGE):

PSONB

t_PSOFF

FPOB

(PSONB ON )

(PSONB ON)

t_PGt_g1

t_PG+ t_g1

t_PG+ t ₁

PGO

PGI

(PSONB OFF)

2) V_33,V_5,V_12A,V_12B(UNDER-VOLTAGE) or I_S33,I_S5,I_S12AB(OVER-CURRENT):

PSONB

t _UVP1= 75ms

PSOFF

tPSOFF

UVP1+tg2

FPOB

t(PSONB ON)

t(PSONB ON )

t(PSONB ON)

t _PG+t

t_PG+ t_g1

t(PSONB OFF)

PGO

PGI

V₃₃/V₅/V₁₂

I_S33/I_S5/I_S12

t_UVP2= 300ms

PSONB

FPOB

t_UVP2

t_PSOFF

t(PSONB ON )

t(PSONB ON)

t_PG+t_g1

PGO

t(PSONB OFF )

PGI

V /V /V₁₂

I_S33/I_S5/I_S12

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TYPICAL TIMMING DIAGRAM(Cont.)

3) V_33,V_5,V_12A,V_12B(OVER-VOLTAGE).

PSONB

PSOFF

tPSOFF

FPOB

t(PSONB ON )

t(PSONB ON)

t_PG1+ t_g1

t_PG+

t(PSONB OFF)

PGO

(PSONB OFF )

V₃₃/V /V₁₂

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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