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UNISONIC TECHNOLOGIES CO., LTD UPS602
HIGH PERFORMANCE CURRENT MODE POWER SWITCH
DESCRIPTION
The UTC UPS602 is designed to provide several special enhancements to satisfy the needs: Power-Saving mode for low standby power, Over Current Protection (OCP), Over Voltage Protection (OVP), Over Load Protection (OLP), UVLO, Over Temperature Protection (OTP) etc protection features. IC will be shutdown when either protection arise and can auto-restart.
LINEAR INTEGRATED CIRCUIT
DIP-8
FEATURES
* Low startup current 20uA typ * Fixed switching frequency(Norm is 70kHz) * Max duty cycle 70% * Power-saving mode for low power * Over temperature protection * Overload protection * Over voltage protection * Leading edge blanking * Soft start
*Pb-free plating product number: UPS602L
ORDERING INFORMATION
Order Number Normal Lead Free Plating UPS602-D08-T UPS602L-D08-T Package DIP-8 Packing Tube
UPS602L-D08-T (1)Packing Type (2)Package Type (3)Lead Plating (1) T: Tube (2) D08: DIP-8 (3) L: Lead Free Plating, Blank: Pb/Sn
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PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
DRAIN
1
8 DRAIN
NC
2
7 CS
VCC
3
6 FB
GND
4
5 SS
PIN DESCRIPTION
PIN 1 2 3 4 5 6 7 8 SYMBOL DRAIN NC VCC GND SS FB CS DRAIN FUNCTION Power MOSFET drain Supply voltage Ground Soft-start Feedback Controller current sense input Power MOSFET drain
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BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
VCC 3
NC
2
1 8
DRAIN DRAIN
OVP OLP OTP
UVLO Reference voltage
Oscillator
SS
5
Soft Start
Latch SQ
Power-Saving Unit
Driver
R
Q
FB
6
PWM COMP
Current Limiting
LEB
7
CS
4 GND
Explain:OLP(Over Load Protection) OVP(Over Voltage Protection) OTP(Over Temperature Protection) UVLO(Under Voltage Latch-Out LEB(Led Edge Blanking) SS(Soft Start)
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LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta 25C, VCC=15V, RT=75k, unless otherwise specified)
PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 26 V Input Voltage to FB Pin VFB -0.3 ~ 6.2 V Input Voltage to CS Pin VCS -0.3 ~ 2.8 V Input Voltage to RT Pin VRT -0.3 ~ 6.2 V Junction Temperature TJ +150 C Operating Temperature TOPR -40 ~ +125 C Storage Temperature TSTG -50 ~ +150 C 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.
OPERATING RANGE
PARAMETER Supply Voltage SYMBOL VCC RATINGS 8.6 ~ 22 UNIT V
ELECTRICAL CHARACTERISTICS (Ta 25C, VCC=15V, RT=75k, unless otherwise specified)
PARAMETER SUPPLY SECTION Start Up Current SYMBOL TEST CONDITIONS VCC=13.5 VSS = 0, IFB = 0 VSS = 5V, IFB = 0 11.8 7.6 MIN TYP 22 3.7 4.0 12.6 8.1 4.5 6.3 68 20 70 MAX 45 5.5 6.0 13.4 8.6 UNIT A mA mA V V V V kHz kHz % % V V k ms ms ms V V C V V s ns V pF
ISTR OFF IOFF Supply Current with switch ON ION UNDER-VOLTAGE LOCKOUT SECTION Start Threshold Voltage VTHD(ON) Min. Operating Voltage VCC(MIN) Hysteresis VCC(HY) INTERNAL VOLTAGE REFERENCE Reference Voltage VREF CONTROL SECTION Normal Switch Frequency F(SW) Power-Saving MAX DMAX Duty Cycle MIN DMIN MIN VMIN VFB Operating Level MAX VMAX Feedback Resistor RFB Soft-Start Time PROTECTION SECTION OVP threshold OLP threshold OTP threshold OVP Disable threshold OLP Enable threshold Spike Blanking time CURRENT LIMITING SECTION LEB POWER MOS-TRANSISTOR SECTION Drain-Source Breakdown Voltage Static Drain-Source On-State Resistance Output Capacitance TSS
measured at pin VFB VFB = 4V VFB = 1V VFB < 0.5V
6.1 61 18 65 0 0.5 2.6
6.5 75 23 75
CSS=0.05uF CSS=0.1uF CSS=1uF VSS < 3.5V, VFB > 5V VSS > 5.4V VFB > 5V, VCC > 17V VFB > 5V 15.2 4.4 120 3.7 4.9
3.8 6 12 120 16 4.6 135 3.9 5.1 6.8 220
4.4 5.0
V(OVP) VFB(OLP) T(THR) VSS(DEACT) VSS(ACT) TSB tLEB VDSS RDS(ON) CO
16.8 4.9 150 4.2 5.4
600 5 56
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ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER SYMBOL Rise Time tR Fall Time tF Turn-Off Delay Time tD(OFF) Drain-Source Diode Continuous Source IS Current
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS
MIN
TYP 21 24 30
MAX
UNIT ns ns ns A
2
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FUNCTIONAL DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The internal reference voltages and bias circuit work at VCC>12.6V, and shutdown at VCC< 8.1V. (1) Soft-Start When every IC power on, driver output duty cycle will be decided by voltage VSS on soft-start capacitor and VCS on current sense resistor at beginning. After VSS reach 5.1V, the whole soft-start phase end, and driver duty cycle depend on VFB and VCS. The relation among VSS, VFB and VOUT as followed FIG.3, here soft-start phase Tsoft-start should more than VOUT start-up phase Tstart-up, otherwise, IC will enter false OLP protection state. Because after the soft-start phase end, if VOUT remain in lower voltage, VFB more than 4.6V, then IC enter false OLP state. Furthermore, soft-start phase should end before VCC reach VCC(MIN) during VCC power on. Otherwise, if soft-start phase remain not end before VCC reach VCC(MIN) during VCC power on, IC will enter auto-restart phase and not set up VOUT. Finally soft-start also set OVP active phase. OVP active phase between VSS=0 and VSS=3.8V, OVP will not be sensed after VSS reach 3.8V.The Soft-start phase TSS 6 ms 12 ms 120 ms (CSS=0.05uF) (CSS=0.1uF) (CSS=1uF)
TSS =
VSS
5.1V
TSOFT-START t VFB
4.6V
t VOUT
TSTRAT-UP t Driver
t
FIG.3 Soft-start phase
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FUNCTIONAL DESCRIPTION(Cont.)
LINEAR INTEGRATED CIRCUIT
(2) Switch Frequency Set The maximum switch frequency decided by an external resistor RT connected between pin RT and ground. Then the maximum switch frequency will depend on user requirement. The relation curve between fSW and RT as followed FIG.5 under the condition of POUT/POUTmax=50%. The equation between fSW and RT as followed (1-2): fSW = -0.61*RT+115.7--------------------------(1-2) After RT connected, switch frequency is also modulated by output power POUT during IC operating. So lower switch frequency at lower load, which more and more improve IC's efficiency at light load. Switch frequency is decreased minimum at no load, then the UPS602 will operate at Power-Saving mode for Lower standby power. The relation curve between fSW and POUT/POUTmax as followed FIG.4 under the condition of RT=75k.
90 80 70 60
fsw (kHz)
50 40 30 20 10
0
110V 220V
1% 2% 3% 4% 5% 6% 7% 8% 9% 10%
POUT/POUTmax (RT=75K)
FIG.4 The relation curve between fSW and relative output power POUT/POUTmax
100 90 80 70
fsw (kHz)
60 50 40 30 20 10 55 60 65 70 75 80 85 90 95
RT (k ) (POUT/POUTmax =50%)
FIG.5 The relation curve between fSW and RT
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FUNCTIONAL DESCRIPTION(Cont.)
LINEAR INTEGRATED CIRCUIT
(3) Protection section UPS602 takes on more protection functions such as OLP, OVP and OTP etc. In case of those failure modes for continual 7.2s (blanking time), the driver is shut down. At the same time, IC enters auto-restart, VCC power on and driver is reset after VCC power on again. OLP After soft-start phase end (VSS>5.1V), IC will shutdown driver if over load state occurs (corresponding to VFB>4.6V) for continual 7.2s. OLP function will not inactive during soft-start phase. OLP case as followed FIG. 6. The test circuit as followed FIG.8 for UPS602.
VCC
12.6V 8.1V
VCC
16V 12.6V 8.1V T restart
VOUT
t
Driver ON/OFF
t
VFB
4.6V
t
7.2s Blanking 7.2s Blanking
VFB
4.6V
t
7.2s Blanking 7.2s Blanking
VSS
5.1V
t
VSS
5.1V 3.9V
SS Phase
t
SS Phase
OVP Phase
t
FIG.6 OLP case FIG.7 OVP case
t
OVP Power supply VCC's OVP function are enabled only when VSS<3.9 & VFB>4.6V during soft-start phase. During above condition, driver will be shutdown if over voltage state occurs (VCC>16V) for continual 7.2s. OVP function will not inactive after soft-start phase. OLP case as followed FIG.7. The test circuit as followed FIG.9 for UPS602. OTP OTP will shut down driver when junction temperature TJ of internal circuits is more than threshold 135C for continual 7.2s.
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FUNCTIONAL DESCRIPTION(Cont.)
15V VCC
LINEAR INTEGRATED CIRCUIT
15V VCC
C4
C13 1 2
IC3 8 7
UPS602
C4 Driver
C13 1 2
IC3 8 7
UPS602
Driver
3 4
6 5 5.5v VFB RCS
VCS
3 4
6 5 3v RCS
VCS
4.6v VFB
20ms
16V VCC
15s
FIG.8 OLP test circuit
FIG.9 OVP test circuit
(4) Driver Output Section Rise edge time of driver output is about 200ns for avoiding Low EMI. (6) Inside power switch MOS transistor For UPS602, it's inside power MOS transistor may load source current 2A. Specific power MOS transistor parameter is as "POWER MOS TRANSISTOR SECTION" in electrical characteristics table.
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TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
F1 AC IN CX1
NF1
1A/600V BD1 C1 D1 + C2 R1
D3 TR1 C6 R6 + C7
L1 C8 +
R7
5V 2A
ZD1
R4
8 7 6 5
1 2 3 4
D2 R2 R3 IC1 + C3
R10
GND R8 R9 R11 R12
C5 C4
IC3
C9
IC2 5V = 3.5A 12V =1.5A
R5
CY1
FIG.10 UPS602 Typical Application Circuit Table1. Components reference description for UPS602 application circuit CX C1 C2 C3 C4 C5 C6 C7 C8 C9 0.1uF/250V 33uF/400V 103/1KV 22uF/250V 104/50V 104/50V 102/100V 680uF/16V 680uF/16V 104/50V R1 R2 R3 R4 R6 R7 R8 R9 R10 R11 R12 100K 2.2M 10 0.22 10 1K 150 3.3K 1K 3.3K 47K 1/2W 1/8W 1/8W 1/4W 1/8W 1/8W 1/8W 1/8W 1/8W 1/8W 1/8W D1 D2 D3 IC1 IC2 CY1 TR1 L1 ZD1 NF1 F1 IC3 BD1 FR107 1N4148 C83-004 PC817C UTC431 222/250V EF25 or EE25 5uH 6.2V1W UU10.5 2A/250V UPS602 1A/600V
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TYPICAL CHARACTERISTICS(Cont.)
LINEAR INTEGRATED CIRCUIT
Fig 1. Feedback Voltage During Loadjump From 10% Up To 100% Load (VDCIN=120V)
120mV 3.86V 1.64kHz 850 Hz
Fig 2. Feedback Voltage During Loadjump From 10% Up To 100% Load (VDCIN=350V)
60.0 mV 3.30 V 3.29kHz 1.70kHz
Ch1 max 6.00V Ch1 min 460 mV Ch1 frequency 785 .5 Hz
Ch1 max 5.90V Ch1 min 40.0mV Ch1 frequency 1.906kHz
Ch1
1.00V
M 400
s A Ch1
3.18V
Ch1
1.00 V
M 200
s A Ch1
2.68 V
Fig 3. Startup With Full Load Condition At VDCIN=120V, Vc4 and Vout
12.3V 12.3V
Fig 4. Startup With Full Load Condition At VDCIN=350V, Vc4 and Vout
12.3V 12.3V
VC4
VC4
Ch1 max 5.04V
Ch1 max 5.04V
Ch1 min 1.32V Ch1 frequency ----- Hz
Ch1 min -120 mV Ch1 frequency ----- Hz
VOUT
VOUT
Ch1
2.00V
Ch2
5.00V
M 10.0ms A
Ch1
3.16V
Ch1
2.00V
Ch2
5.00V
M 10.0ms A
Ch1
3.16V
Fig 5. Startup Behavior At Nominal Load Condition VDCIN =120V 120mV 12.3V 357Hz 21.2Hz
Fig 6. Startup Behavior At Nominal Load Condition VDCIN =350V 240 mV 12.0V 1.79kHz 147 Hz
VC4
VC4
VFB VSS
VFB V SS
Ch1 Ch3
2.00V 2.00V
Ch2
2.00V
M 4 .00 ms A
Ch3
4 .96 V
Ch1 Ch3
2.00 V 2.00 V
Ch2
2.00V
M 4.00ms A
Ch3
4.96V
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TYPICAL CHARACTERISTICS(Cont.)
Fig 7. Frequency vs. Output Power 120 100 1.0 0.9 0.8
LINEAR INTEGRATED CIRCUIT
Fig 8. NO Load Input Power vs. Line Voltage (Normal Mode)
Input Power (W)
Frequency(KHz)
80 60 40 20 0 0 2 4 6 8 10 12 14 16 18 20 Output Power(W) VDCIN=120V
0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 100
Input Power NO Load (PoUT=0W)
150
200 250 300 DC Input Voltage(V)
350 400
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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