M62211P/FP General Purpose Multi Function DC/DC Converter REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Description M62211FP is designed as a general purpose multi-function DC/DC converter. This small 10-pin package contains many functions allowing simpler peripheral circuits and compact set design. The output circuit is designed OPEN-COLLECTOR output. This makes the application for STEP-UP, STEP-DOWN and INVERTING. The input of this unit has two channels containing priority control circuit. This makes the control a simple matter when the back-light is on and during the stable state. Feature • • • • • • • Wide operation power supply voltage range…….. 2.5 to 35 V Operation can be synchronized by the external sync signal. Operation can be controlled using two prioritized systems. (High input has priority) High speed switching is possible. (500 kHz max) Output short protection circuit and ON/OFF control are used. The dead-time control and the soft-start operation are possible. Small size 10-pin SOP package. Applications Back-light control of personal computers and word processors General electric products REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 1 of 11 M62211P/FP Block Diagram VCC 10 OSC & sync ckt TIN 5 COSC 4 UVLO VTH : 2.3V VCC PWM Comp OP Amp1 − Std. voltage 1.25 V 2 Emitter output 1.25 V Short protection circuit − VCC + − 1.86 V + IN2 8 Collector output + + − + IN1 9 1 R + OP Amp2 S − 1.15 V 7 6 Q 0.3 V 3 FB DTC GND Pin Arrangement M62211P M62211FP Collector output 1 10 VCC Collector output 1 14 VCC Emitter output 2 9 IN1 Emitter output 2 13 IN1 GND 3 8 IN2 GND 3 12 IN2 COSC 4 7 FB COSC 4 11 FB TIN 5 6 DTC TIN 5 10 DTC NC 6 9 NC NC 7 8 NC (Top view) Outline: PRSP0010DB-A (10P2N-A) (Top view) NC: No connection Outline: PRDP0014AA-A (14P4) REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 2 of 11 M62211P/FP Absolute Maximum Ratings (Ta = 25°C, unless otherwise noted) Item Power supply voltage Symbol VCC Ratings 36 Units V Output voltage Output current Conditions VO IO 36 150 V mA Power dissipation Thermal derating ratio Pd Kθ 1500 (P) 450 (FP) 1.2 (P) 3.6 (FP) mW mW/°C Operating ambient temperature Storage temperature Topr Tstg −20 to +85 −40 to +150 °C °C Ta = 25°C Ta > 25°C Electrical Characteristics (Ta = 25°C, VCC = 12 V, COSC = 390 pF, unless otherwise noted) Block Item Symbol Min Limits Typ Max Units Test Condition All device Power supply voltage range Circuit current VCC ICC 2.5 2.4 35 3.5 V mA Std. voltage section Error Amp. section Standard voltage VREF 1.19 1.25 1.31 V Line regulation LINE 5 12 mV Input bias current IB 500 nA Open loop gain Unity gain bandwidth AV GB 80 0.6 dB MHz Output high voltage Output low voltage VOM+ VOM− 1.7 2.5 400 V mV VFB = 1.86 V VFB = 1.86 V Output sink current Output source current lOM+ IOM− 6 −100 −50 mA µA VFB = 1.86 V VIN1 = 1 V, VIN2 = 1 V Oscillation frequency Upper limit voltage of oscillation waveform fOSC VOSCH 110 1.0 kHz V Lower limit voltage of oscillation waveform Cosc charge current VOSCL 0.45 V IOSC CH −120 µA Cosc discharge current 1 Cosc discharge current 2 IOSC DlS1 IOSC DIS2 30 120 µA µA TIN "H" level TIN "L" level VTlNH VTlNL 2.2 VCC 1.0 V V Oscillator section REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 3 of 11 No load Voltage follower VCC = 2.5 to 3.5 V M62211P/FP Electrical Characteristics (Ta = 25°C, VCC = 12 V, COSC = 390 pF, unless otherwise noted) Block UVLO section Short protection circuit Output section Min Limits Typ Max Units Start-up threshold voltage Shut-down threshold voltage VTH ON VTH OFF 2.2 2.3 2.25 2.4 V V Hysteresis FB threshold voltage VHYS VTH FB 20 50 1.86 80 mV V Latch mode "H" threshold voltage VTH DTC 1.15 V Latch mode "L" threshold voltage VTL DTC 0.3 V DTC charge current when start-up DTC discharge current 1 ICH1 IDIS1 −35 45 µA µA VDTC = 0.7 V, VFB = 2.11 V VDTC = 0.7 V, VFB = 2.11 V DTC charge current when stable state DTC discharge current 2 ICH2 −15 µA VDTC = 0.7 V, VFB = 0.7 V IDIS2 20 µA VDTC = 0.2 V, VFB = 2.11 V Collector output leak current ICL −1 1 µA VCE = 35 V, VCC = 35 V Collector output saturation voltage VSAT1 1.6 V Emitter follower, IE = 50 mA, VC = 12 V Item REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 4 of 11 Symbol Test Condition VIN1 = 1 V, VIN2 = 1 V, VDTC = 0.7 V VIN1 = 1 V, VIN2 = 1 V, VFB = 2.11 V VIN1 = 1 V, VIN2 = 1 V, VFB = 2.11 V M62211P/FP Explanation of Back Light Control Circuit DC/AC D1 VCC C1 + C0 OSC & sync ckt + − IN1 OP Amp1 R3 Std voltage 1.25 V − D2 VR1 + − + + IN2 FL Tube R1 + + − COSC + UVLO VTH = 2.3 V R OP Amp2 + SQ − Cf2 Cf1 RDTC + CDTC R2 R4 CDELAY CFL RFL RI1 RI2 Figure 1 An Application of the Back Light Control Circuit 1. Priority Control Operation As far as OPAmp1 and OPAmp2 are concerned, there is no problem when either IN1 or IN2 is used to control current, since the setting up to lower the output voltage of the DC/DC converter is prioritized. (The above figure uses IN1 to control current) (1) When starting, the output voltage "VO" is determined by the feedback to IN2 via R1 and R2 and the following equation: VO = VREF × (R1 + R2) / R2 (VREF = 1.25 V typ) (Area of the Timing Chart 1) (2) Next, this output voltage "VO" is used to discharge the FL tube by the inverter and causes the tube current to flow. The tube current is filtered and smoothed by RFL, D2, and CFL so that the DC voltage (VCFL) corresponding to the tube current is generated at CFL. The voltage of VCFL is divided by R3, VR1, and R4, and feedback to IN1, it can control tube current. (Area of the Timing Chart 2) (3) Here, CDELAY is inserted between R3 and VR1 + R4 in order to regulate the timing to switch from the voltage control to the current control. (Area of the Timing Chart 3) (4) When in the current control state, it is possible to adjust brightness by changing the amount of feedback of the tube current using VR1. (Area of the Timing Chart 4) (5) If the feedback used for controlling current is lost due to irregularities in the FL tube. etc. The control returns to the voltage control mode. (Area of the Timing Chart 5) REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 5 of 11 M62211P/FP Timing Chart DC/DC OUT (V) Tube current (mArms) VCFL (V) VCDELAY (V) I III REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 6 of 11 II IV V M62211P/FP 2. Setting up TIN 1) Setting up the level The TIN terminal is shown in Figure a. In order for the level of TIN to satisfy the conditions shown in the table below, the external circuits shown in Figure b or Figure c should be used when the external voltage level of the input is high. 100 kΩ TIN 5 5 5 50 kΩ 3 GND Figure a Items TIN "H" level TIN "L" level Figure b Symbols VTINH VTINL Figure c Min Typ Max Unit 2.2 VCC 1.0 V V 2) Setting up frequency The periodical change of TIN is expected to be +30% to −20%. The fIN is set to approximately 1.5 times fOSC. fIN = 1.5 • fosc fosc ≈ 1 1.3 µs + (23 × 103 × Cosc) (Hz) COSC TIN REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 7 of 11 M62211P/FP 3. Soft Start, DTC, and Short Protection 1) Soft Start (The peripheral circuit is shown in Figure 1) When the power is turned ON, IN1 and IN2 are at 0 V level. Therefore, the FB terminal is fixed to High level. The DTC terminal goes up gradually starting from 0 V due to the internal charge current and the external CDTC. When the level of DTC terminal reaches the lower limit of the triangular wave of the oscillator, PWM comparator and the output circuit go into operation causing the output voltage, "VO" of the DC/DC converter to rise. The charge current is designed to be approximately 35 µA. FB DTC 1.0 V OSC 0.45 V OFF External Tr collector ON Figure 2 2) DTC The dead time control is set by installing a resistor between the DTC terminal and GND. However, the DTC terminal serves as the short protection circuit also. Therefore, its set up depends on whether the short protection circuit is used and not. When the short protection circuit is used At this time, the charge current for DTC is approximately 10 µA. Therefore, RDTC should be set to 40 kΩ to 110 kΩ. When the short protection circuit is not used At this time, the charge current for DTC is approximately 45 µA. Therefore, RDTC is set to 12 kΩ to 25 kΩ. 3) Short protection circuit The short protection circuit used the timer latch system. It is determined by setting the capacity used for the soft start connected to the DTC terminal. Figure 3 shows the short protection circuit and the timing chart for various modes. When the power is turned on, the FB terminal goes high (approx. 2.4 V) and the DTC terminal goes low. (goes up slowly from 0 V) Thus, approximately 35 µA current will flow when SW1: ON and SW2: OFF. The potential, namely the potential of the FB terminal is in the amplitude of the triangular wave, SW1 will be OFF and SW2 will be ON and approximately 45 µA will flow into the DTC terminal. This discharge current will cause the DTC terminal to drop from 1.15 V. At this time, if the potential of the FB terminal goes to the control potential before the potential at the DTC terminal goes lower than 0.45 V which is the lower limit value of the triangular wave and if the potential of the FB terminal is lower than the potential of the DTC terminal, then the system is activated. When the output is shorted, the system is either activated or latched depending on whether the time for the high potential of the FB terminal reaches the potential of the control state is long or short. (For detail, see [II] and [IV] of the Mode) There are two ways to go back to operation after the latch to shut off output. Either method can restart with soft start. 1. Turning on the VCC. 2. Make the FB terminal to go to the low potential of 1.25 V or less. Then, it is cancelled. REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 8 of 11 M62211P/FP [Mode Explained] [I] Mode…............. Activation This is used when the FB terminal goes down to the control state potential when the DTC terminal is in up slope. In order for the activation to occur when the DTC terminal is in down slope, the FB terminal potential must go below the DTC terminal before the DTC terminal goes to 0.45 V. [II] Mode…........... Output short → Activation The system is activated if the FB terminal potential goes below the DTC terminal potential before the DTC terminal goes to 0.45 V. If there is not enough time, the output is turned OFF. (Latched) [III] Mode….......... ON/OFF Control → Activation This mode turns off the output by forcing the DTC terminal to go down. (The system) returns as in the case of the activation. [IV] Mode….......... Output short (Latch) The output is turned OFF when the FB terminal potential did not go down to the control state before the DTC terminal went down to 0.45 V. REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 9 of 11 M62211P/FP Comp1 − + FB (Initial RESET) 1.86 V R Q VCC 1.25V I2 25 µA I1 10 µA S SW1 DTC + RDTC 90 kΩ (900 mV) SW2 CDTC − I3 55 µA Comp2 1.15 V 0.3 V Note: SW1 and SW2 are turned ON by "H" signal. FB 2.0 DTC set up value (Tentative) DTC 1.15 1.0 OSC 0.45 0.20 0 I1 ON ON ON ON ON ON ON ON ON ON ON I2 ON OFF OFF OFF OFF ON ON OFF OFF OFF ON I3 OFF ON OFF ON OFF OFF OFF ON OFF ON ON Charge 10µ Discharge 45µ Charge 10µ Charge 35µ Charge Discharge 35µ 45µ Charge 10µ Discharge 45µ Discharge 20µ Charge Discharge 35µ 45µ Activate Output short [ I ] [ II ] ON/OFF control [ III ] Activate Output short (Latch) [ IV ] Figure 3 Short Protection Circuit and the Timing Chart of the Modes REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 10 of 11 M62211P/FP Package Dimensions JEITA Package Code P-SOP10-5.7x6.8-1.27 RENESAS Code PRSP0010DB-A MASS[Typ.] 0.2g E 6 *1 HE 10 Previous Code 10P2N-A F NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET. 1 A2 5 Index mark A1 c *2 Reference Symbol A L D *3 e bp Detail F y D E A2 A1 A bp c HE e y L RENESAS Code PRDP0014AA-A Previous Code 14P4 8 1 7 0 0.35 0.18 0° 7.82 1.12 0.3 Nom Max 6.8 6.9 5.7 5.8 1.8 0.1 0.2 2.1 0.4 0.5 0.2 0.25 8° 8.12 8.42 1.27 1.42 0.1 0.5 0.7 MASS[Typ.] 1.0g c *1 E 14 Min 6.7 5.6 e1 JEITA Package Code P-DIP14-6.3x19-2.54 Dimension in Millimeters D L A1 A A2 *2 NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET. e *3 b3 SEATING PLANE bp Reference Symbol e1 D E A A1 A2 bp b3 c e L REJ03D0842-0201 Rev.2.01 Nov 14, 2007 Page 11 of 11 Dimension in Millimeters Min Nom Max 7.32 7.62 7.92 18.8 19.0 19.2 6.15 6.3 6.45 4.5 0.51 3.3 0.4 0.5 0.6 1.4 1.5 1.8 0.22 0.27 0.34 0° 15° 2.29 2.54 2.79 3.0 Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Notes: 1. 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