TA1307P TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA1307P Integrated Circuit For Standby Power-Supply Control TA1307P is a switching power-supply IC used as a standby power-supply control such as small power-supply. This IC, Slight power-supply can do that a MOSFET is controlled in intermittent, and this IC is optimum IC as objects for power-supply control, such as color TV, monitor, VCR, DVD, FAX, printer, etc. Main Characteristics · Burst mode PWM pulse output · The over current protection circuits to power MOSFET for a drive are built in. · UVLO (Under Voltage Lock Out), OVLO (Over Voltage Lock Out) with Latch, OVLO on/off function Weight: 0.5 g (typ.) OCL (Over Current Limmiter), Select SW for IC active/IC not active are built in. · The starting current until UVLO is canceled about 100 µA. · Wide range input voltage: (85 V to 264 V). 1 2002-02-12 TA1307P 7 Pulse output OCL 8 GND1 Pulse out GND2 Stand Power Supply Application Circuit Example (voltage detection by 2nd side) 6 Output stop 0.2 V OSC Band gap 5 3 V (pulse output stop) /2.5 V (pulse output start) UVLO 7 V/5 V Standby ON/OFF Vout 0.01 mF 20 mF 3 FB 2 Standby SW 1 OSC establish Vcc UVLO 12 V Latch 4 0.01 mF Hi: Standby OFF mode …IC not active Pin2 (OSC establish) Low: Standby ON mode (OVLO off) …IC active Outside resistance use ±2% Open: Standby ON mode (OVLO on) …IC active 3 V (fix) = Upper limit DC for FB comparator 2.5 V (fix) = Lower limit DC for FB comparator FB IN PULSE Output expansion OSC Wave PULSE Output FB IN (Vout) Figure 1 Movement Explain 2 2002-02-12 TA1307P With outputting burst switching control pulse from IC, burst enegize of the TRANS is carried out. Voltage stabilized also at the time of a light load can be supplied. It is the optimum IC for constituting the power-supply system for minute electric-power supply. By this IC, the burst time of switching control pulse is decided by level of output ripple of a power-supply system. As for the terminal 4 which is carrying out the monitor of the power-supply output-voltage value, another side is connected to the comparator. The standard voltage value of this comparator has hysterisis, 2.5 V and 3 V fixation. (inside IC) Since output DC voltage of a power supply is stabilized, power-supply output voltage is detected and it feedbacks for the terminal 4 (FB IN terminal). When the voltage value of a terminal 4 tends to become more than 3 V, switching control pulse of a terminal 7 (pulse out) is stopped. If pulse is stooped, in order not to control power-supply TRANS, it will stop supplying energy supplied to the output of a power supply, and the output DC voltage of a power-supply will descend. If output DC voltage tends to become less than (V/2.5), switching control pulse of a terminal 7 (pulse out) will be outputted. Power-supply TRANS is made to drive and PULSE supplies energy to a power-supply output. Then, output DC voltage rises. Burst electric supply is realized by repeating the above-mentioned operation. Vout Vcc R2 IF Is VF FB comparater Vref 2.5 V/3 V Figure 2 Vz = 3.9 V 4 R1 FB R3 IC Iz Ripple Voltage Establish (example) Hereafter, calculation using ripple level as an example Voltage of Vout and the terminal 2 is set output DC voltage to Vref. Vout = Vz + VF + 1/CTR ´ R2/R1 ´ Vref *CTR = IC/IF *IZ = IF + IS, R3 is set up. For example, R1 = 10 kW, R2 = R3 = 1 kW, CTR = about 1, Vz = 3.9 V, VF = 0.7 V Vref (minimum) = 2.5 V fixation and Vref (maximum) = 3 V fixation. Calculation Vout (minimum) = 4.85 V Vout (maximum) = 4.9 V. Ripple in an output is 0.05 V. Internal oscillation circuit for obtaining output PULSE is built in. Oscillation frequency of output PULSE can be set up by outside attachment resistance to a terminal 2. Duty about 50% of output PULSE has been obtained. Oscillation frequency is calculation from f = i/2 CV (Hz), I = 1 (V) /R/10, and it will be set to 25 kHz, if 20 kW is attached to a terminal 2 outside. Terminal voltage and R are outside attachment resistance in 1 (V). 10 is a current ratio, sets current of a terminal 2 to 1/10, and makes it the charge/discharge current of a internal 50 pF capacitor. C = 50 (pF) (built-in capacitor value) V = 2 (V) (oscillation amplitude) 3 2002-02-12 TA1307P In addition, there is a function below as a PROTECT circuits. A terminal 5 (OCL) detects the overcurrent of MOSFET connected to the terminal 7 (pulse out), and output Pulse is made to compulsion low at the time of an overcurrent. Output pulse will be made to compulsion low, if it flows into a terminal 7 (pulse out) and there is always 40 mA or more of current. Output pulse will be made to compulsion low, if the supply voltage of a terminal 1 (VCC) becomes more than 12 V.(OVLO) Circuit operation start of the UVLO function is carried out more than by 7 V, and it carries out a circuit operation stop less than 5 V. Pin Connection (top view) VCC 1 8 GND2 OSC establish 2 7 Pulse OUT Standby SW 3 6 GND1 FB IN 4 5 OCL Pin2 (OSC establish) Outside resistance use ±2% Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Supply Voltage VCC max 14 V Maximum Input Voltage VIN max VCC + 0.3 V Minimun Input Voltage VIN min GND - 0.3 V PD max 817 mW Operating Temperature Topr -25~85 °C Storage Temperature Tstg -55~150 °C Power Dissipation (Note 1) Note 1: Derated above Ta = 25°C in the proportion of 6.5 mW/°C 4 2002-02-12 TA1307P 425 Power dissipation PD (mW) 817 0 25 85 150 Ta (°C) Figure 3 PD - Ta Curve Recommended Operating Condition Characteristics Pin No. Min Typ. Max Unit 1 7.5 ¾ 11.5 V Power Supply Voltage Electrical Characteristics DC Characteristics (There is no designation Vcc = 9 V, Ta = 25°C) (reference: a measurement circuit is figure 4) Symbol Pin No. Test Condition Min Typ. Max Unit Power Current (9 V) I1Load 1 Load of 100 pF is connected with Pin7. SW1 = ON, SW2 = b, SW3 = a 0.8 1.2 1.6 mA Power Current (9 V) I1on 1 0.39 0.55 0.72 mA 0.05 0.09 0.13 mA (Note 2) ¾ 0.7 0.5 (Note 3) 0.9 0.7 ¾ Characteristics Pin3 = Low voltage input (standby ON mode) SW1 = ON, SW2 = b, SW3 = b Power Current (9 V) I1off 1 Pin3 = Hi voltage input (standby OFF mode) SW1 = Open, SW2 = a, SW3 = b V3th L Pin3 Threshold Voltage 3 V3th H V Note 2: V3 th L is threshold voltage “Standby ON (IC active) mode” Note 3: V3 th H is threshold voltage “Standby OFF (IC not active) mode” 5 2002-02-12 100 pF TA1307P b SW3 Standby SW FB IN Pulse out OSC establish 2 3 4 20 kW 1 43 kW SW1 9V 20 m F 5 VCC 0.01 mF 6 GND1 7 GND2 8 OCL a 150 kW 0.01 mF a b open SW2 a: Standby OFF mode …IC not active b: Standby ON mode (OVLO off) …IC active open: Standby ON mode (OVLO on) …IC active Pin2 (OSC establish) Outside resistance use ±2% Figure 4 DC Terminal Voltage Measurement Circuit 6 2002-02-12 TA1307P AC Characteristics (there is no designation VCC = 9 V, Ta = 25°C) (refer: Next page AC characteristic measurement, Figure 5 AC characteristic measurement circuit) Characteristics UVLO Movement Voltage Symbol Measurement Method No. VUL 1 VUH Min Typ. Max 4.6 5.0 5.5 6.6 7.0 7.4 Unit V Istrt 2 30 55 90 mA (temperature margin -0.016% is contained) FOSC 3 20.2 25.0 29.8 kHz Output Pulse Rise Time TRPF 4 50 100 160 ns TSPF 5 50 100 160 ns Output Pulse Max. Voltage VOPFMX 6 7.0 7.5 8.0 V Output Pulse Min. Voltage VOPFMN 7 -0.1 0.1 0.65 V IOPFC 8 27.0 40.0 53.0 mA V7pt 9 30.0 40.0 ¾ mA Vth4H 10 2.9 3.0 3.1 V Vth4L 11 2.4 2.5 2.6 V V5pt 12 0.18 0.2 0.22 V V1ovlo 13 11.5 12.0 12.5 V I StSW 14 0.5 0.7 0.9 V I FBIN 15 0.08 0.15 0.30 mA Start Up Current Triangle Wave Oscillate Frequency (reference data) Output Pulse Fall Time (reference data) Output Current (source, sink) (reference data) Output Terminal (pin7) PROTECT Movement Current V7pt FB IN Terminal (pin4) FB Comparator THRESHOLD Hi Voltage FB IN Terminal (pin4) FB Comparator THRESHOLD Low Voltage OCL Terminal (pin5) PROTECT Movement Current VCC Terminal (pin1) OVLO Movement Voltage Standby SW Terminal (pin3) Movement Voltage FB IN Terminal (pin4) Input Current 7 2002-02-12 TA1307P AC Characteristics Measurement (there is no designation VCC = 9 V, Ta = 25°C) (refer: Figure 5 AC characteristic measurement circuit) No. SW mode Characteristics 1 2 3 Test Condition 4 UVLO movement voltage Pin4 (FB IN) = GND (VUL/VUH) Confirm pin7 (pulse out) pulse is output. 1 b b a a Vcc voltage is lowered, and measure Vcc voltage when pin7 output pulse disappears.(VUL) And Vcc voltage is upped, and measure Vcc voltage when pin7 output pulse appears.(VUH) Pin4 (FB IN) = GND Start Up Current Input voltage Vcc < 5.0 V 2 b b a a (= pin7 pulse is not outputted) And Vcc voltage is upped (Vcc = 9V) Measure source current through Vcc (I strt). Pin4 (FB IN) = GND Triangle Wave Oscillate Frequency 3 b b a a Confirm pin7 (pulse out) pulse is output. Measure pulse period, look for frequency. (Fosc) 4 5 6 7 Output Pulse Rise Time (reference data) b Output Pulse Fall Time (reference data) b Output Pulse Max. Voltage Output Pulse Min. Voltage Above condition, measure pulse rise time b a a :pulse amplitude 10% to 90% (TRPF) Above condition, measure pulse fall time b a a :pulse amplitude 10% to 90% (TSPF) b b a a Above condition, measure pulse Max. voltage. (VOPMX) b b a a Above condition, measure pulse Min. voltage. (VOPMN) 8 2002-02-12 TA1307P AC Characteristics Measurement (there is no designation VCC = 9 V, Ta = 25°C) (refer: Figure 5 AC characteristic measurement) No. SW mode Characteristics Test Condition 1 2 3 4 b b a b Output Current 8 (source, sink) Measure pin7 (pulse out) current for using current probe. (reference data) Output Terminal (pin7) PROTECT Movement Current 9 b b a c Increase DC voltage for pin7 (FB IN) through resistance (100 W), pin7 pulse is made to output. pin7 DC voltage is upped, and measure pulse highest level voltage and increase DC voltage (V6) when pin7 pulse duty is began to become short. i7 pt is calculated by bottom type. I7pt = (pulse highest level voltage - V6 DC voltage) /100 W FB IN Terminal (pin4) 10 FB Comparator THRESHOLD Hi Voltage b a a a Pin4 DC voltage is upped, and measure pin4 voltage when pin7 pulse disappears. (Vth4H) FB IN Terminal (pin4) 11 FB Comparator THRESHOLD Low Voltage b a a a And Pin4 DC voltage is lowered, and measure pin4 voltage when pin7 pulse appears.(Vth4L) Pin4 (FB IN) = GND. Confirm pin7 (pulse out) pulse is output. OCL Terminal (pin5) PROTECT Movement Current 12 Increase DC voltage for pin4 (FB IN) (early value is 2.0 V) pin7 pulse is made to output. b b a a Pin5 (OCL) connect outside power supply. Pin5 DC voltage is upped, and measure pin5 voltage when pulse disappears. Pin4 (FB IN) = GND Vcc Terminal (pin1) OVLO Movement Voltage 13 Confirm pin7 (pulse out) pulse is output. d b a a Pin1 (Vcc) DC voltage is upped, and measure Vcc voltage when pulse disappears.(V1OVLO) Standby SW Terminal (pin3) Pin4 (FB IN) = GND Movement Voltage Confirm pin7 (pulse out) pulse is output. 14 c b a a Pin3 (standby SW) connect outside power supply. Pin3 DC voltage is upped (early value is 0 V), and measure pin3 voltage when pulse disappears. FB IN Terminal (pin4) 15 Input Current b c a a Pin4 (FB IN) connect outside power supply (3.5 V). Measure pin4 current. 9 2002-02-12 TA1307P 100kW V6 510 p V5 b SW3 b c SW4 1 2 5 OCL GND1 6 FB IN OSC establish Pulse out 7 VCC GND2 8 a Standby SW a 3 4 0.01 mF 0.01 mF 9V 20 kW 20 m F SW1 c a bd a A V3 V1 V4 V2 Pin2 (OSC establish) Outside resistance use ±2% Figure 5 SW2 c b A a: Standby OFF mode …IC not active b: Standby ON mode (OVLO off) …IC active open: Standby ON mode (OVLO on) …IC active AC Characteristics Measurement Circuit 10 2002-02-12 TA1307P Package Dimensions Weight: 0.5 g (typ.) 11 2002-02-12 TA1307P RESTRICTIONS ON PRODUCT USE 000707EBA · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. 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