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UNISONIC TECHNOLOGIES CO., LTD 3515A
PC POWER SUPPLY SUPERVISOR
DESCRIPTION
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. 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. 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.
SOP-14
CMOS IC
DIP-14
* Pb-free plating product number: 3515AL
FEATURES
* OVP/UVP monitors 3.3V, 5V, 12V input voltage level. * OCP monitors IS33, IS5, IS12 input 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 Normal Lead Free Plating 3515A-D14-T 3515AL-D14-T 3515A-S14-R 3515AL-S14-R 3515A-S14-T 3515AL-S14-T Package DIP-14 SOP-14 SOP-14 Packing 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
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd
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PIN ASSIGNMENT
PGI GND FPOB PSONB IS12AB RI V12B 1 2 3 4 5 6 7 14 13 12 11 10 9 8 PGO VDD V5 V33 V12A IS33 IS5
CMOS IC
FUNCTION DESCRIPTION
PGI PSONB UV&OC Protection OV Protection PGI<1.2V L No No PGI<1.2V L No Yes PGI<1.2V L Yes No PGI<1.2V L Yes Yes PGI>1.2V L No No PGI>1.2V L No Yes PGI>1.2V L Yes No PGI>1.2V L Yes Yes X H X X 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 FPOB L H L H L H H H H PGO L L L L H L L L L
PIN DESCRIPTIONS
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN NAME PGI GND FPOB PSONB IS12AB RI V12B IS5 IS33 V12A V33 V5 VDD PGO TYPE Input Supply Output Input Input Input Input Input Input Input Input Input Supply Output DESCRIPTION Power Good Input. For ATX SMPS, it detects AC line voltage through the main transformer. 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. 12V AB over current protection. Reference setting. One external resistor Ri connected between RI and GND pin will determine a reference current, IREF = 1.20/Ri, for OCP programming. 12V over/under voltage protection. 5V over current protection. 3.3V over current protection 12V over/under voltage protection. 3.3V over/under voltage protection 5V over/under voltage protection. 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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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BLOCK DIAGRAM
CMOS IC
V cc + UN PGO
PGI Bandgap Reference V REF=1.2V IS33
73 s debounce
clr
225ms delay
V12A + IREF*8 VS33 + OV + UN V12A IS12AB + IREF*8 VS12A + OV + UN V12A + Power On Reset PWR 73 s debounce RQ SQ FPOB
Internal Power VCCI=3.6V PSONB
2.4ms delay
38 ms debounce
75ms/ 300ms delay
VS12B
+ OV + UN V12A
PWR
OSC
CLK
IS5
+ IREF*8 + OV + UN -
V12A
VS5
VREF=1.2V
+ RI
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www.unisonic.com.tw
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ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL Supply Voltage, VDD, V12A
CMOS IC
RATINGS UNIT -0.3 ~ 16 V V5,V33, PSONB, IS5, IS33 -0.3 ~ 7 V Input Voltage VIN IS12AB, V12B -0.3 ~ 16 V V PGI -0.3 ~ VDD+0.3 FPOB -0.3 ~ 7 V Output Voltage VOUT PGO -0.3 ~ 7 V Operating Temperature TOPR -40 ~ +125 Storage Temperature TSTG -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 Supply Voltage VDD Supply Voltage VCC2 Input Voltage Output Voltage Output Sink Current RI Output Current Supply Voltage Rising Time (VDD) V5,V33 ,PGI ,PSONB V12A, V12B FPOB PGO FPOB PGO SYMBOL VDD VIN VOUT IO(SINK) IO(RI) tR 10 1 MIN 4 9.5 TYP 12 12 MAX 15 15 7 15 7 7 30 10 65 UNIT V V V V V V mA mA uA ms
ELECTRICAL CHARACTERISTICS (Ta=25
PARAMETER Over Voltage Detection Over Voltage Threshold Low Level Output Voltage (FPOB) Output Leakage Current (FPOB) PSONB High-Level Input Voltage Low-Level Input Voltage Input Pull-up Current PGI and PGO Under Voltage Threshold Input Threshold Voltage (PGI) Low Level Output Voltage (PGO) Output Leakage Current (PGO) SYMBOL V12A, V12B V5 V33 VOL ILEAK VIH VIL IIN
and VDD=5V and V12A=12V) TEST CONDITIONS MIN 13.2 5.7 3.7 TYP 13.8 6.1 3.9 MAX UNIT 14.4 6.5 4.1 0.3 0.7 5 V V V V uA V V uA V V V V V uA
ISINK=10mA ISINK=30mA V(FPOB)=5V 2
0.8 PSONB=0V 9.5 4.1 2.55 1.16 120 10 4.30 2.69 1.20 10.5 4.47 2.83 1.24 0.4 5
V12A, V12B V5 V33 VI(THD) VOL ISINK=10mA ILEAK PGO=5V
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www.unisonic.com.tw
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ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER SWITCHING CHARACTERISTICS PSONB ON(PSONB Low to FPOB Low) PSONB OFF(PSONB Hi to PGO Low) PGI to PGO Delay Time Timing PGO Low to FPOB high UVD/OCD Turn on Delay Time Noise Deglitch Time Noise Deglitch Time for Latch TOTAL DEVICE Low Voltage Supply Current SYMBOL T(PSONB ON) T(PSONB OFF) TPG TPSOFF TUVP1 TUVP2 tg1 tg2 VDD IDD TEST CONDITIONS MIN 32 32 200 2.0 65 260 63 63 TYP 38 38 300 2.4 75 300 75 75 3.0 PSONB=5V
CMOS IC
MAX UNIT 62 62 490 4 122 488 120 120 ms ms ms ms ms ms s s V mA
VDD=5V VDD=5V VDD=5V VDD=5V
FPOB=Low & PGI > 1.2V FPOB=Low & PGI < 1.2V
1
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www.unisonic.com.tw
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APPLICATION INFORMATION
5VSB
CMOS IC
5V 3515A
PGI
1
PGI
14 PGO 13 0.01 F
2 10K
GND
VDD
3
FPOB
V5
12
300 PSONB 0.01 F IS12AB RI
4
PSONB
V33
11 +3.3V
5
IS12AB
V12A
10
V12A
6
RI
IS33
9
IS33
12VB
7
V12B
IS5
8
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www.unisonic.com.tw
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APPLICATION INFORMATION
CMOS IC
IL RL V5 C I5 R 8xIREF (IREF=VREF/RI ) R L: inductor DC resistor +
-
If IL* RL (8 * I REF) * R, then OCP active. And the capacitor C is used to avoide power on fail or dynamic load fail We suggest C > 1F. . EX How to select the resistor of R? Assume RI =30K, RL =3m, OCP=20A Sol R = ( IL * R L ) / ( 8 * IREF ) = ( 20A * 3m) / { 8 * ( 1.2V / 30K)} = 187.5
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TYPICAL TIMMING DIAGRAM
1) PGI (UNDER-VOLTAGE):
PSONB
CMOS IC
FPOB t(PSONB ON ) t PG+t g1
t PSOFF t(PSONB ON) t PG+ t g1 t(PSONB OFF ) t PG+ tg1
t PSOFF
PGO
t(PSONB OFF )
PGI
2) V33, V5, V12A, V12B (UNDER-VOLTAGE) or IS33, IS5, IS12AB (OVER-CURRENT):
PSONB
tPSOFF t UVP1 = 75ms tUVP1+tg2 tPSOFF
FPOB
t(PSONB ON ) t(PSONB ON )
1
t(PSONB ON ) t PG +tg1 t(PSONB OFF )
t PG + t g1
PGO
t(PSONB OFF ) PGI
V33/V5/V12 IS33/IS5 /I S12
PSONB
tUVP2 = 300ms
FPOB t(PSONB ON ) PGO
t UVP2 + t g2
t PSOFF
t(PSONB ON )
t PG+ t g1 t(PSONB OFF )
PGI V33 / V5 /V12 IS33 /IS5 /IS12
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www.unisonic.com.tw
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TYPICAL TIMMING DIAGRAM(Cont.)
3) V33, V5, V12A, V12B (OVER-VOLTAGE).
PSONB t PSOFF t(PSONB ON ) t PG+ t g1 PGO t(PSONB OFF ) t(PSONB ON )
CMOS IC
FPOB
tg 2 t(PSONB ON ) t PG1 + t g1
tPSOFF
t(PSONB OFF )
V33 /V5 /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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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