MB39A103

FUJITSU SEMICONDUCTOR DATA SHEET DS04-27230-3E ASSP For Power Manegement Applications (DC/DC Converter for DSC/Camcorder) 4-ch DC/DC Converter IC for low voltage MB39A103 ■ DESCRIPTION The MB39A103 is a 4-channel DC/DC converter IC using pulse width modulation (PWM). This IC is ideal for up conversion, down conversion, and up/down conversion. Achievement of low voltage start-up (1.7 V or more) enables operation from low voltage. 4ch is built in TSSOP-30P/package. Each channel can be controlled, and soft-start. This is an ideal power supply for high-performance portable devices such as digital still cameras. This product is covered by US Patent Number 6,147,477. ■ FEATURES • • • • • • • • • • Supports for down-conversion and up/down Zeta conversion (CH1) Supports for up-conversion and up/down Sepic conversion (CH2 to CH4) Low voltage start-up (CH4): 1.7 V Power supply voltage range : 2.5 V to 11 V Reference voltage : 2.0 V ± 1 % Error amplifier threshold voltage : 1.24 V ± 1.5 % Built-in totem-pole type output for MOS FET Built-in soft-start circuit independent of loads High-frequency operation capability: 1.5 MHz (Max) External short-circuit detection capability by −INS terminal ■ PACKAGES 30-pin plastic TSSOP 32-pad plastic BCC (FPT-30P-M04) (LCC-32P-M15) MB39A103 ■ PIN ASSIGNMENTS (TOP VIEW) CS2 −INE2 FB2 DTC2 VCC CTL VREF RT CT GND CSCP DTC3 FB3 −INE3 CS3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 CS1 −INE1 FB1 DTC1 VCCO OUT1 OUT2 OUT3 OUT4 GNDO −INS DTC4 FB4 −INE4 CS4 (FPT-30P-M04) (Continued) 2 MB39A103 (Continued) (TOP VIEW) (Penetration diagram from surface) −INE2 −INE1 DTC2 CS2 CS1 FB2 N.C. 1 32 31 30 29 28 27 26 FB1 25 DTC1 VCC 2 24 VCCO CTL 3 23 OUT1 VREF 4 22 OUT2 RT 5 21 OUT3 CT 6 20 OUT4 GND 7 19 GNDO −INS CSCP 8 18 N.C. 9 10 11 12 13 14 15 16 17 DTC4 −INE3 −INE4 DTC3 FB3 CS3 CS4 (LCC-32P-M15) FB4 3 MB39A103 ■ PIN DESCRIPTION Block Pin No. TSSOP 27 28 CH1 29 30 25 4 3 CH2 2 1 24 12 13 CH3 14 15 23 19 18 CH4 17 16 22 9 OSC 8 6 Control 11 20 26 5 Power 7 21 10 5 3 8 18 24 2 4 19 7 RT CTL CSCP −INS VCCO VCC VREF GNDO GND ⎯ I ⎯ I ⎯ ⎯ O ⎯ ⎯ BCC 25 26 27 28 23 32 31 30 29 22 10 11 12 13 21 17 16 15 14 20 6 Symbol DTC1 FB1 −INE1 CS1 OUT1 DTC2 FB2 −INE2 CS2 OUT2 DTC3 FB3 −INE3 CS3 OUT3 DTC4 FB4 −INE4 CS4 OUT4 CT I/O I O I ⎯ O I O I ⎯ O I O I ⎯ O I O I ⎯ O ⎯ Descriptions Dead time control terminal Error amplifier output terminal Error amplifier inverted input terminal Soft-start setting capacitor connection terminal Totem pole type output terminal Dead time control terminal Error amplifier output terminal Error amplifier inverted input terminal Soft-start setting capacitor connection terminal Totem pole type output terminal Dead time control terminal Error amplifier output terminal Error amplifier inverted input terminal Soft-start setting capacitor connection terminal Totem pole type output terminal Dead time control terminal Error amplifier output terminal Error amplifier inverted input terminal Soft-start setting capacitor connection terminal Totem pole type output terminal Triangular wave frequency setting capacitor connection terminal Triangular wave frequency setting resistor connection terminal Power supply control terminal Short-circuit detection circuit capacitor connection terminal Short-circuit detection comparator inverted input terminal Output block power supply terminal Power supply terminal Reference voltage output terminal Output block ground terminal Ground terminal 4 MB39A103 ■ BLOCK DIAGRAM Threshold voltage accuracy ±1.5% 29 −INE1 Error VREF 10 µA Amp1 − + CS1 30 + 1.24 V FB1 28 DTC1 27 Threshold voltage accuracy ±1.5% −INE2 2 Error VREF 10 µA Amp2 − + CS2 1 + 1.24 V FB2 3 DTC2 4 Threshold voltage accuracy ±1.5% −INE3 14 Error VREF 10 µA Amp3 − + CS3 15 + 1.24 V FB3 13 DTC3 12 Threshold voltage accuracy ±1.5% 17 −INE4 Error VREF 10 µA Amp4 − + CS4 16 + 1.24 V FB4 18 DTC4 19 L priority L priority L priority L priority L priority PWM +Comp.1 + − CH1 Drive1 Pch 26 VCCO 25 OUT1 IO = 130 mA at VCCO = 4 V L priority PWM +Comp.2 + − CH2 Drive2 Nch 24 OUT2 IO = 130 mA at VCCO = 4 V L priority PWM +Comp.3 + − CH3 Drive3 Nch 23 OUT3 IO = 130 mA at VCCO = 4 V L priority PWM +Comp.4 + − CH4 Drive4 Nch 22 OUT4 21 GNDO IO = 130 mA at VCCO = 4 V VREF Short detection signal (L: at short) 100 kΩ −INS 20 1V CSCP 11 SCP Comp. − + H: at SCP SCP Error Amp Power Supply SCP Comp. Power Supply Error Amp Reference 0.9 V 0.4 V OSC 5 VCC UVLO2 UVLO1 H:UVLO release bias Accuracy ±1% 1.24 V Power VREF VR1 ON/OFF CTL 6 CTL 2.0 V 7 VREF 10 GND 89 RT CT H : ON (Power/ ON) L : OFF (Standby mode) VTH = 1.4 V 5 MB39A103 ■ ABSOLUTE MAXIMUM RATINGS Parameter Power supply voltage Output current Peak output current Power dissipation Storage temperature Symbol VCC IO IOP PD TSTG Condition VCC, VCCO terminals OUT1 to OUT4 terminals OUT1 to OUT4 terminals Duty ≤ 5% (t = 1/fOSC×Duty) TA ≤ +25 °C (TSSOP-30P) TA ≤ +25 °C (BCC-32P) ⎯ Rating Min ⎯ ⎯ ⎯ ⎯ ⎯ −55 Max 12 20 400 1390* 980* +125 Unit V mA mA mW mW °C * : The packages are mounted on the epoxy board (10 cm × 10 cm). WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. ■ RECOMMENDED OPERATING CONDITIONS Parameter Start power supply voltage Power supply voltage Reference voltage output current Input voltage Control input voltage Output current Oscillation frequency Timing capacitor Timing resistor Soft-start capacitor Short-circuit detection capacitor Reference voltage output capacitor Operating ambient temperature Symbol VCC VCC IREF VINE VDTC VCTL IO fOSC CT RT CS CSCP CREF TA Condition VCC, VCCO terminals (CH4) VCC, VCCO terminal s (CH1 to CH4) VREF terminal −INE1 to −INE4 terminals −INS terminal DTC1 to DTC4 terminals CTL terminal OUT1 to OUT4 terminals * ⎯ ⎯ CS1 to CS4 terminals ⎯ ⎯ ⎯ Min 1.7 2.5 −1 0 0 0 0 −15 100 39 11 ⎯ ⎯ ⎯ −30 Value Typ ⎯ 4 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 500 100 24 0.1 0.1 0.1 +25 Max 11 11 Unit V V 0 mA V VCC − 0.9 V VREF VREF V 11 V +15 mA 1500 kHz 560 pF 130 kΩ 1.0 µF 1.0 µF 1.0 +85 µF °C * : See “■ SETTING THE TRIANGULAR OSCILLATION FREQUENCY”. Note: Pin numbers referred after this part are present on TSSOP-30P PKG. WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device’s electrical characteristics are warranted when the device is operated within these ranges. Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand. 6 MB39A103 ■ ELECTRICAL CHARACTERISTICS Parameter Output voltage Output voltage temperature stability Input stability Load stability Threshold voltage Hysteresis width Threshold voltage Hysteresis width Threshold voltage Input source current Reset voltage Oscillation frequency Frequency temperature stability Symbol Pin No 7 7 7 7 22 VREF ∆VREF /VREF Line Load VTH (VCC = VCCO = 4 V, TA = +25 °C) Value Conditions Unit Min Typ Max ⎯ 1.98 2.00 2.02 V TA = −30 °C to +85 °C VCC = 2.5 V to 11 V VREF = 0 mA to −1 mA VCC = ⎯ −10 −10 1.4 0.5* ⎯ ⎯ 1.5 ⎯ +10 +10 1.65 % mV mV V Under voltage SoftUnder voltage Triangular Short-circuit lockout protection start lockout protection circuit block wave oscillator detection block block circuit block (CH1 to CH3) block [OSC] [SCP] [CS1 to CS4] (CH4) [UVLO1] [UVLO2] Reference voltage block [Ref] VH 22 ⎯ 0.02 0.05 0.1 V VTH 25 VCC = 1.7 1.8 1.95 V VH VTH ICSCP VRST fOSC ∆fOSC/ fOSC 25 11 11 25 22, 23, 24, 25 VREF = ⎯ ⎯ ⎯ 0.05 0.65 −1.4 1.3 450 0.1 0.70 −1.0 1.45 500 0.2 0.75 −0.6 1.63 550 V V µA V kHz CT = 100 pF, RT = 24 kΩ TA = −30 °C to +85 °C 22, 23, 24, 25 ⎯ 1* ⎯ % Charge current ICS 1, 15, 16, 30 CS1 to CS4 = 0 V −14 −10 −6 µA Threshold voltage Input bias current Voltage gain Frequency bandwidth Error amplifier block [Error Amp1 to Error Amp4] VTH IB AV BW 3, 13, 18, 28 2, 14, 17, 29 3, 13, 18, 28 3, 13, 18, 28 FB1 to FB4 = 0.65 V −INE1 to −INE4 = 0 V DC AV = 0 dB 1.222 1.240 1.258 −120 ⎯ ⎯ −30 100* 1.6* ⎯ ⎯ ⎯ V nA dB MHz * : Standard design value (Continued) 7 MB39A103 (Continued) Parameter Error amplifier block [Error Amp1 to Error Amp4] Symbol Pin No 3, 13, 18, 28 3, 13, 18, 28 3, 13, 18, 28 3, 13, 18, 28 22, 23, 24, 25 22, 23, 24, 25 4, 12, 19, 27 (VCC = VCCO = 4 V, TA = +25 °C) Value Conditions Unit Min Typ Max ⎯ ⎯ FB1 to FB4 = 0.65 V FB1 to FB4 = 0.65 V Duty cycle = 0 % Duty cycle = Dtr DTC1 to DTC4 = 0.4 V Duty ≤ 5 % (t = 1/fOSC×Duty) OUT1 to OUT4 = 0 V Duty ≤ 5 % (t = 1/fOSC×Duty) OUT1 to OUT4 = 4 V OUT1 to OUT4 = −15 mA VOH Output voltage VOL Output source current Output sink current Threshold voltage ISOURCE ISINK VT0 VT100 IDTC 1.7 ⎯ ⎯ 150 0.3 ⎯ −2.0 ⎯ 1.9 40 −2 200 0.4 0.9 −0.6 −130 ⎯ 200 −1 ⎯ ⎯ 1.0 ⎯ −75 V mV mA µA V V µA mA PWM comparator block [PWM Comp.1 to PWM Comp.4] Input current Output source current Output sink current Output ON resistor Threshold voltage Input bias current CTL input voltage Output block [Drive1 to Drive4] ISOURCE 22, 23, 24, 25 ISINK ROH ROL VTH 22, 23, 24, 25 22, 23, 24, 25 22, 23, 24, 25 25 75 ⎯ ⎯ 0.97 130 18 18 1.00 ⎯ 27 27 1.03 mA Ω Ω V OUT1 to OUT4 = 15 mA ⎯ Short-circuit detection comparator block [SCP Comp.] IB VIH VIL ICTLH 20 6 6 6 6 5 26 5 −INS = 0 V IC Active mode IC Standby mode CTL = 3 V CTL = 0 V CTL = 0 V CTL = 0 V CTL = 3 V −25 1.7 0 5 ⎯ ⎯ ⎯ ⎯ −20 ⎯ ⎯ 30 ⎯ 0 0 2.3 −17 11 0.8 60 1 2 2 4.5 µA V V µA µA µA µA mA Control block [CTL] Input current ICTLL Standby current Power supply current ICCS ICCSO ICC *: Standard design value. 8 General MB39A103 ■ TYPICAL CHARACTERISTICS Power Supply Current vs. Power Supply Voltage 5 Reference Voltage vs. Power Supply Voltage 5 Power supply current ICC (mA) 4 3 2 1 0 0 2 4 6 8 10 12 Reference voltage VREF (V) TA = +25 °C CTL = 3 V 4 3 2 1 0 0 2 4 6 8 TA = +25 °C CTL = 3 V VREF= 0 mA 10 12 Power supply voltage VCC (V) Power supply voltage VCC (V) Reference Voltage vs. Operating Ambient Temperature 2.05 2.04 VCC = 4 V CTL = 3 V VREF= 0 mA Reference voltage VREF (V) 2.03 2.02 2.01 2.00 1.99 1.98 1.97 1.96 1.95 −40 −20 0 20 40 60 80 100 Operating ambient temperature TA (°C) Reference Voltage vs. CTL terminal Voltage 5 CTL terminal Current vs. CTL terminal Voltage 200 4 3 2 1 0 0 2 4 6 8 CTL terminal current ICTL (µA) Reference voltage VREF (V) TA = +25 °C VCC = 4 V VREF= 0 mA CTL = 3 V TA = +25 °C VCC = 4 V 160 120 80 40 0 0 2 4 6 8 10 12 10 12 CTL terminal voltage VCTL (V) CTL terminal voltage VCTL (V) (Continued) 9 MB39A103 Triangular Wave Oscillation Frequency vs. Timing Resistor 10000 Triangular Wave Oscillation Frequency vs. Timing Capacitor 10000 Triangular wave oscillation frequency fOSC (kHz) Triangular wave oscillation frequency fOSC (kHz) TA = +25 °C VCC = 4 V CTL = 3 V TA = +25 °C VCC = 4 V CTL = 3 V 1000 1000 100 CT = 560 pF CT = 39 pF CT = 100 pF CT = 220 pF 100 RT = 130 kΩ RT = 11 kΩ RT = 24 kΩ RT = 56 kΩ 10 1 10 100 1000 10 10 100 1000 10000 Timing resistor RT (kΩ) Timing capacitor CT (pF) Triangular Wave Upper and Lower Limit Voltage vs. Triangular Wave Oscillation Frequency 1.2 Triangular Wave Upper and Lower Limit Voltage vs. Operating Ambient Temperature 1.2 Triangular wave upper and lower limit voltage VCT (V) 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 Upper Triangular wave upper and lower limit voltage VCT (V) TA = +25 °C VCC = 4 V CTL = 3 V RT = 24 kΩ VCC = 4 V 1.1 CTL = 3 V 1 RT = 24 kΩ CT = 100 pF 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 −40 −20 0 20 40 60 Upper Lower Lower 80 100 200 400 600 800 1000 1200 1400 1600 Triangular wave oscillation frequency fOSC (kHz) Operating ambient temperature TA (°C) Triangular Wave Oscillation Frequency vs. Operating Ambient Temperature Triangular wave oscillation frequency fOSC (kHz) 560 540 520 500 480 460 440 −40 VCC = 4 V CTL = 3 V RT = 24 kΩ CT = 100 pF −20 0 20 40 60 80 100 Operating ambient temperature TA (°C) (Continued) 10 MB39A103 (Continued) Error Amplifier Voltage Gain, Phase vs. Frequency Error amplifier voltage gain AV (dB) 40 30 20 10 0 −10 −20 −30 −40 100 1k 10 k 100 k 1M −180 10 M −90 0 ϕ AV TA = +25 °C VCC = 4 V 180 2.48 V 240 kΩ 90 Phase φ (deg) 10 kΩ 1 µF + IN 10 kΩ 2.4 kΩ −INE1 29 − + + 1.24 V 28 OUT 30 CS1 1.5 V Error Amp1 the same as other channels Frequency f (Hz) Power Dissipation vs. Operating Ambient Temperature (TSSOP-30P) 1600 Power Dissipation vs. Operating Ambient Temperature (BCC-32P) Power dissipation PD (mW) 1000 980 800 600 400 200 0 −40 Power dissipation PD (mW) 1400 1390 1200 1000 800 600 400 200 0 −40 −20 0 20 40 60 80 100 −20 0 20 40 60 80 100 Operating ambient temperature TA (°C) Operating ambient temperature TA (°C) 11 MB39A103 ■ FUNCTIONS 1. DC/DC Converter Functions (1) Reference voltage block (Ref) The reference voltage circuit generates a temperature-compensated reference voltage (2.0 V Typ) from the voltage supplied from the VCC terminal (pin 5). The voltage is used as the reference voltage for the IC’s internal circuitry. The reference voltage can supply a load current of up to 1 mA to an external device through the VREF terminal (pin 7). (2) Triangular-wave oscillator block (OSC) The triangular wave oscillator incorporates a timing capacitor and a timing resistor connected respectively to the CT terminal (pin 9) and RT terminal (pin 8) to generate triangular oscillation waveform amplitude of 0.4 V to 0.9 V. The triangular waveforms are input to the PWM comparator in the IC. (3) Error amplifier block (Error Amp1 to Error Amp4) The error amplifier detects the DC/DC converter output voltage and outputs PWM control signals. In addition, an arbitrary loop gain can be set by connecting a feedback resistor and capacitor from the output terminal to inverted input terminal of the error amplifier, enabling stable phase compensation to the system. Also, it is possible to prevent rush current at power supply start-up by connecting a soft-start capacitor with the CS1 terminal (pin 30) to CS4 terminal (pin 16) which are the non-inverted input terminal for Error Amp. The use of Error Amp for soft-start detection makes it possible for a system to operate on a fixed soft-start time that is independent of the output load on the DC/DC converter. (4) PWM comparator block (PWM Comp.1 to PWM Comp.4) The PWM comparator is a voltage-to-pulse width modulator that controls the output duty depending on the input/ output voltage. The output transistor turns on while the error amplifier output voltage and DTC voltage remain higher than the triangular wave voltage. (5) Output block (Drive1 to Drive4) The output block is in the totem pole type, capable of driving an external P-channel MOS FET (channel 1), and N-channel MOS FET (channels 2 to 4). 12 MB39A103 2. Channel Control Function The main or each channel is turned on and off depending on the voltage levels at the CTL terminal (pin 6), CS1 terminal (pin 30), CS2 terminal (pin 1), CS3 terminal (pin 15), and CS4 terminal (pin 16). Channel On/Off Setting Conditions CTL CS1 CS2 CS3 CS4 Power CH1 CH2 CH3 CH4 L H H H H H H ⎯* GND High-Z GND GND GND High-Z ⎯* GND GND High-Z GND GND High-Z ⎯* GND GND GND High-Z GND High-Z ⎯* GND GND GND GND High-Z High-Z OFF ON ON ON ON ON ON OFF OFF ON OFF OFF OFF ON OFF OFF OFF ON OFF OFF ON OFF OFF OFF OFF ON OFF ON OFF OFF OFF OFF OFF ON ON *: Undefined 3. Protective Functions (1) Timer-latch short-circuit protection circuit (SCP, SCP Comp.) The short-circuit detection comparator detects the Error Amp output voltage level of each channel, and if any channel output voltage of Error Amp reaches the short-circuit detection voltage, the timer circuits are actuated to start charging the external capacitor CSCP connected to the CSCP terminal (pin 11). When the capacitor (CSCP) voltage reaches about 0.7 V, the circuit is turned off the output transistor and sets the dead time to 100 %. In addition, the short-circuit detection from external input is capable by using −INS terminal (pin 20) on shortcircuit detection comparator (SCP Comp.) . To release the actuated protection circuit, either the power supply turn off and on again or set the CTL terminal (pin 6) to the “L” level to lower the VREF terminal (pin 7) voltage to 1.3 V (Min) or less. (See “■SETTING TIME CONSTANT FOR TIMER-LATCH SHORT-CIRCUIT PROTECTION CIRCUIT”.) (2) Under voltage lockout protection circuit (UVLO) The transient state or a momentary decrease in supply voltage, which occurs when the power supply is turned on, may cause the IC to malfunction, resulting in breakdown or degradation of the system. To prevent such malfunctions, under voltage lockout protection circuit detects a decrease in internal reference voltage with respect to the power supply voltage, turns off the output transistor, and sets the dead time to 100% while holding the CSCP terminal (pin 11) at the “L” level. The circuit restores the output transistor to normal when the supply voltage reaches the threshold voltage of the undervoltage lockout protection circuit. ■ PROTECTION CIRCUIT OPERATING FUNCTION TABLE This table refers to output condition when protection circuit is operating. Operating circuit OUT1 OUT2 Short-circuit protection circuit Under voltage lockout protection circuit H H L L OUT3 L L OUT4 L L 13 MB39A103 ■ SETTING THE OUTPUT VOLTAGE • CH1 to CH4 VO R1 − R2 −INEx + + 1.24 V CSx Error Amp VO (V) = 1.24 R2 (R1 + R2) x: Each channel No. ■ SETTING THE TRIANGULAR OSCILLATION FREQUENCY The triangular oscillation frequency is determined by the timing capacitor (CT) connected to the CT terminal (pin 9), and the timing resistor (RT) connected to the RT terminal (pin 8). Moreover, it shifts more greatly than the calculated values according to the constant of timing resistor (RT) when the triangular wave oscillation frequency exceeds 1 MHz. Therefore, set it referring to “Triangular Wave Oscillation Frequency vs. Timing Resistor” and “Triangular Wave Oscillation Frequency vs. Timing Capacitor” in “■ TYPICAL CHARACTERISTICS”. Triangular oscillation frequency : fOSC fOSC (kHz) = : 1200000 CT (pF) •RT (kΩ) 14 MB39A103 ■ SETTING THE SOFT-START TIME To prevent rush currents when the IC is turned on, you can set a soft-start by connecting soft-start capacitors (CS1 to CS4) to the CS1 terminal (pin 30) to the CS4 terminal (pin 16), respectively. Setting each CTLx from “H” to “L” switches to charge the external soft-start capacitors (CS1 to CS4) connected to the CS1 terminal (pin 30) to CS4 terminal (pin 16) at 10 µA. The error amplifier output (FB1 to FB4) is determined by comparison between the lower one of the potentials at two non-inverted input terminals (1.24 V, CS terminal voltages) and the inverted input terminal voltage (−INE1 to −INE4). The FB terminal voltage during the soft-start period (CS terminal voltage < 1.24 V) is therefore determined by comparison between the −INE terminal and CS terminal voltages. The DC/DC converter output voltage rises in proportion to the CS terminal voltage as the soft-start capacitor connected to the CS terminal is charged. The soft-start time is obtained from the following formula: Soft-start time: ts (time to output 100%) ts (s) = 0.124 × CSX (µF) : • Soft-Start Circuit VO VREF 10 µA R1 −INEx R2 L priority Error Amp − CSx + + 1.24 V CTLx CSx FBx UVLO CH ON/OFF signal L: ON, H: OFF x: Each channel No. 15 MB39A103 ■ TREATMENT WITHOUT USING CS TERMINAL When not using the soft-start function, open the CS1 terminal (pin 30), the CS2 terminal (pin 1), the CS3 terminal (pin 15), the CS4 terminal (pin 16). • Without Setting Soft-Start Time “OPEN” 1 CS2 CS1 30 “OPEN” “OPEN” 15 CS3 CS4 16 “OPEN” 16 MB39A103 ■ SETTING TIME CONSTANT FOR TIMER-LATCH SHORT-CIRCUIT PROTECTION CIRCUIT Each channel uses the short-circuit detection comparator (SCP) to always compare the error amplifier′s output level to the reference voltage. While DC/DC converter load conditions are stable on all channels, the short-circuit detection comparator output remains at “L” level, and the CSCP terminal (pin 11) is held at “L” level. If the load condition on a channel changes rapidly due to a short-circuit of the load, causing the output voltage to drop, the output of the short-circuit detection comparator on that channel goes to “H” level. This causes the external short-circuit protection capacitor CSCP connected to the CSCP terminal (pin 11) to be charged at 1 µA. Short-circuit detection time : tSCP tSCP (s) = 0.70 × CSCP (µF) : When the capacitor CSCP is charged to the threshold voltage (VTH = 0.70 V), the latch is set and the external : FET is turned off (dead time is set to 100%). At this time, the latch input is closed and the CSCP terminal (pin 11) is held at “L” level. In addition, the short-circuit detection from external input is capable by using −INS terminal (pin 20) on the short-circuit detection comparator (SCP Comp.). The short-circuit detection operation starts when −INS terminal voltage is less than threshold voltage (VTH = 1 V). : When the power supply is turn off and on again or VREF terminal (pin 7) voltage is less than 1.3 V (Min) by setting CTL terminal (pin 6) to “L” level, the latch is released. • Timer-latch short-circuit protection circuit VO FBx R1 −INEx R2 − + 1.24 V VREF −INS 20 Error Amp − + 1V SCP Comp. SCP + + + + − 1.1 V : FB1 to FB3 1.0 V : FB4 1 µA To each channel Drives CSCP 11 CSCP CTL VREF S R UVLO Latch x: Each channel No. Note : When using self-power supply configuration in which the output from the CH4 DC/DC converter is connected to the VCC, note that short-circuit detection is not possible in the CH4 DC/DC converter output. 17 MB39A103 ■ TREATMENT WITHOUT USING CSCP TERMINAL When not using the timer-latch short-circuit protection circuit, connect the CSCP terminal (pin 11) to GND (pin 10) with the shortest distance. • Treatment without using CSCP terminal 10 11 GND CSCP 18 MB39A103 ■ SETTING THE DEAD TIME When the device is set for step-up or inverted output based on the step-up or step-up/down Zeta conversion, step-up/down Sepic conversion or flyback conversion, the FB terminal voltage may reach and exceed the triangular wave voltage due to load fluctuation. If this is the case, the output transistor is fixed to a full-ON state (ON duty = 100 %). To prevent this, set the maximum duty of the output transistor. To set it, set the voltage at the DTC terminal by applying a resistive voltage divider to the VREF voltage as shown below. When the DTC terminal voltage is higher than the triangular wave voltage, the output transistor is turned on. The maximum duty calculation formula assuming that triangular wave amplitude = 0.5 V and triangular wave : lower voltage = 0.4 V is given below. : DUTY (ON) Max= : Vdt − 0.4 V Rb × 100 (%) , Vdt (V) = 0.5 V Ra + Rb × VREF When the DTC terminal is not used, connect it directly to the VREF terminal (pin 7) as shown below (when no dead time is set). • When using DTC to set dead time Ra DTCx Rb 7 VREF Vdt x: Each channel No. • When no dead time is set DTCx 7 VREF x: Each channel No. 19 MB39A103 ■ POWERR SUPPLY EXAMPLE USING CH4 FOR SELF-POWER SUPPLY The MB39A103 can be started with the low input voltage (VIN ≥ 1.7 V) if the CH4 is used as a self-power supply. An example of supply the power using the transformer is shown below. • Power supply example using CH4 for self-power supply VCCO 2 VIN OUT4 −INE4 D CS4 16 17 VREF − + + 1.24 V FB4 18 VO4-3 −7.5 V 5 VCC Error Amp4 22 21 GNDO D VO4-1 15 V VO4-2 5V Setting shown in the “■❨APPLICATION EXAMPLE” is as follows: • Number of windings for VCC and VCCO is set to the value equivalent to VIN + 2.5 V. CH1 to CH3 are operational on VCC ≥ 2.5 V; in order for the CH1 to CH3 to operate on VIN ≥ 1.7 V, the number of windings should be set equivalent to VIN + 0.8 V or more for VCC and VCCO. 20 MB39A103 ■ OPERATION EXPLANATION WHEN CTL TURNING ON AND OFF When CTL is turned on, internal reference voltage VR and VREF generate. When VREF exceeds each threshold voltage (VTH1, VTH2) of UVLO1 and UVLO2 (under voltage lockout protection circuit), UVLO1 and UVLO2 are released, and the operation of output Drive circuit of each channel becomes possible. When CTL is off, VR and VREF fall. When VREF decreases and UVLO1 and UVLO2 fall below each reset voltage (VRST1, VRST2), UVLO operates and output Drive circuit of each channel is forcibly done the operation stop, and makes the output off state. For the period to reach to 2.0 V by VREF voltage after UVLO1 and UVLO2 are released by turning on CTL (refer to a and b in “• Timing Chart”) and the period when VREF decreases from 2.0 V after turning off CTL until UVLO1 and UVLO2 operate (refer to a’ and b’ in “• Timing Chart”), VREF which is the reference voltage does not reach 2.0 V. Therefore, the bias voltage and the bias current in IC do not reach a prescribed value, and the speed of response for IC has decreased. Note : For this reason, when the input sudden change and the load sudden change occur in this period, IC cannot respond immediately and the output might overshoot. Therefore, impress the voltage to CTL terminal by which the VREF terminal voltage never stays in the abovementioned period. • CTL Block Equivalent Circuit H : at SCP SCP To CH1 to CH3 output Drive circuit H : Possible to operate L : Forcibly stop To CS1 to CS3 charge/discharge circuit H : Possible to charge L : Forcibly discharge To CH4 output Drive circuit H : Possible to operate L : Forcibly stop UVLO2 H : UVLO release UVLO1 bias To CS4 charge/discharge circuit H : Possible to charge ErrorAmp Reference L : Forcibly discharge 1.24 V H : UVLO release VREF VR Power ON/OFF CTL 5 VCC 6 CTL 7 VREF 21 MB39A103 • Timing Chart VR = 1.24 V (Typ) Error Amp Reference voltage VR VTH1 VTH2 VREF = 2.00 V (Typ) VRST2 VRST1 Reference voltage VREF UVLO1 b UVLO1 release b' Valid UVLO1 a UVLO2 UVLO2 release a' Valid UVLO2 CH4 output Drive circuit control CH1 to CH3 output Drive circuit control Possible to operate Fixed full-off Possible to operate Fixed full-off Fixed full-off Fixed full-off CTL terminal voltage 1.5 V ± 0.2 V (Typ) 22 MB39A103 ■ I/O EQUIVALENT CIRCUIT 〈〈Reference voltage block〉〉 VCC 5 1.24 V ESD protection element + − 77.3 kΩ 124 kΩ GND 10 ESD protection element ESD protection element 7 VREF CTL 6 67 kΩ CSx 〈〈Control block〉〉 〈〈Soft-start block〉〉 VREF (2.0 V) 104 kΩ GND GND 〈〈Short-circuit detection block〉〉 VREF (2.0 V) 2 kΩ 〈〈Triangular wave oscillator block (RT) 〉〉 VREF (2.0 V) 0.7 V + − 8 RT 〈〈Triangular wave oscillator block (CT)〉〉 VREF (2.0 V) 11 CSCP CT 9 GND GND GND 〈〈Error amplifier block (CH1 to CH4) 〉〉 VCC VREF (2.0 V) −INEx 〈〈Short-circuit detection comparator block〉〉 VCC VREF (2.0 V) −INS 20 FBx 100 kΩ (1 V) CSx 1.24 V GND GND 〈〈PWM comparator block (CH1 to CH4) 〉〉 VCC 〈〈Output block (CH1 to CH4) 〉〉 VCCO 26 FBX DTCX CT OUTX GNDO 21 GND x: Each channel No. 23 MB39A103 ■ APPLICATION EXAMPLE R13R14 −INE1 29 A 3.3 kΩ12 kΩ 15 kΩ R15 CS1 30 C20 R16 0.1 µF 1 kΩ C21 28 0.1 µF FB1 R17 18 kΩ 27 DTC1 R18 13 kΩ R19R20 −INE2 2 B 3 kΩ22 kΩ 15 kΩ R21 CS2 1 C22 R22 0.1 µF 1 kΩ C23 0.1 µF FB2 3 R23 18 kΩ 4 DTC2 R24 13 kΩ R25R26 −INE3 14 C 2.4 kΩ43 kΩ 15 kΩ R27 CS3 15 C24 R28 0.1 µF 2 kΩ C25 VIN 0.047 µF FB3 13 (1.7 V to 5 V) R29 33 kΩ 12 DTC3 R30 20 kΩ R31R32 −INE4 17 D 2.4 kΩ43 kΩ 15 kΩ R33 CS4 16 C26 R34 0.1 µF 2 kΩ C27 0.047 µF FB4 18 R35 19 33 kΩ DTC4 R36 −INS 20 kΩ 20 CSCP 11 VCCO 26 R4 C1 0.1 µF 150 Ω C3 4700 pF Q1 VC1 A C5 4.7 µF L2 15 µH VO1 2.5 V, 250 mA CH1 25 OUT1 VB1 L1 C4 D1 1 µF 22 µH C6 10 µF L3 C18 B 10 µH VC2 R12 OUT2 300 Ω 24 C16 4700 pF 4.7 µF VB2 C17 1 µF Q5 L4 15 µH D7 VO2 3.3 V, 500 mA C19 10 µF CH2 C D5 CH3 OUT3 23 C13 1 µF T1 C14 D6 2.2 µF C15 2.2 µF Q4 VO3-1 15 V, 10 mA VO3-2 5 V, 50 mA CH4 OUT4 22 GNDO 21 D D2 C8 1 µF VCC C32µF D8 2.2 D4 C2 0.1 µF Q2 C11 2.2 µF T2 VO4-1 15 V, 10 mA Charging current C9 VO4-2 2.2 µF 5 V, 50 mA D3 C10 2.2 µF VO4-3 −7.5 V, −5 mA 5 C28 0.01 µF 6 8 RT R37 24 kΩ 9 CT fOSC accuracy ±10% 7 VREF C30 0.1 µF CTL 10 GND C29 100 pF H : ON (Power ON) L : OFF (Standby mode) VTH = 1.4 V 24 MB39A103 ■ PARTS LIST COMPONENT Q1, Q2, Q4 Q5 D1, D7, D8 D2 to D6 L1 L2 L3 L4 T1, T2 C1, C2, C30 C3, C16 C4, C8, C13 C5, C18 C6, C19 C9 to C11 C13, C17 C14, C15 C20 to C24, C26 C25, C27 C28 C29 R4 R12 R13 R14 R15, R21, R27 R16, R22 R17 R18 R19 R20 R23 R24 R25, R31 R26 R28, R34 R29, R35 R30, R36 R32 R33 R37 ITEM PNP Tr Nch FET NPN Tr Diode Diode Inductor Inductor Inductor Inductor Transformer Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor SPECIFICATION VCEO = −12 V, IC = −3 A VDS = 20 V, ID = 1.8 A VCEO = 15 V, IC = 3 A VF = 0.4 V (Max) , at IF = 1 A VF = 0.55 V (Max) , at IF = 0.5 A 22 µH 15 µH 10 µH 15 µH ⎯ 0.1 µF 4700 pF 1 µF 4.7 µF 10 µF 2.2 µF 1 µF 2.2 µF 0.1 µF 0.047 µF 0.01 µF 100 pF 150 Ω 300 Ω 3.3 kΩ 12 kΩ 15 kΩ 1 kΩ 18 kΩ 13 kΩ 3 kΩ 22 kΩ 18 kΩ 13 kΩ 2.4 kΩ 43 kΩ 2 kΩ 33 kΩ 20 kΩ 43 kΩ 15 kΩ 24 kΩ 0.63 A, 160 mΩ 0.76 A, 120 mΩ 0.94 A, 67 mΩ 0.76 A, 120 mΩ ⎯ 50 V 50 V 25 V 10 V 6.3 V 16 V 25 V 16 V 50 V 50 V 50 V 50 V 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% VENDOR SANYO SANYO SANYO SANYO SANYO TDK TDK TDK TDK SUMIDA TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm PARTS No. CPH3106 MCH3405 CPH3206 SBS004 SB05-05CP RLF5018T-220MR63 RLF5018T-150MR76 RLF5018T-100MR94 RLF5018T-150MR76 CLQ52 5388-T095 C1608JB1H104K C1608JB1H472K C3216JB1E105K C3216JB1A475M C3216JB0J106K C3216JB1C225K C3216JB1E105K C3216JB1C225K C1608JB1H104K C1608JB1H473K C1608JB1H103K C1608CH1H101J RR0816P-151-D RR0816P-301-D RR0816P-332-D RR0816P-123-D RR0816P-153-D RR0816P-102-D RR0816P-183-D RR0816P-133-D RR0816P-302-D RR0816P-223-D RR0816P-183-D RR0816P-133-D RR0816P-242-D RR0816P-433-D RR0816P-202-D RR0816P-333-D RR0816P-203-D RR0816P-433-D RR0816P-153-D RR0816P-243-D Note : SANYO TDK SUMIDA ssm : SANYO Electric Co., Ltd. : TDK Corporation : SUMIDA Electric Co., Ltd. : SUSUMU Co., Ltd. 25 MB39A103 ■ REFERENCE DATA TOTAL Efficiency vs. Input Voltage 100 95 TA = +25 °C VO1 = 2.5 V, 250 mA VO2 = 3.3 V, 500 mA VO3-1 = 15 V, 10 mA VO3-2 = 5 V, 50 mA VO4-1 = 15 V, 10 mA VO4-2 = 5 V, 50 mA VO4-3 = −7.5 V, −5 mA fOSC = 500 kHz TOTAL efficiency η (%) 90 85 80 75 70 65 60 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input voltage VIN (V) Each CH Efficiency vs. Input Voltage 100 95 TA = +25 °C Each CH efficiency η (%) 90 85 80 75 70 65 60 1.0 CH3 CH4 CH1 Note: Only concerned CH and CH4 (self-power supply) are ON. CH2 Include external SW Tr operating current CH4 includes IC current consumption. 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 1.5 Input voltage VIN (V) (Continued) 26 MB39A103 Conversion Efficiency vs. Load Current (CH1) 100 TA = +25 °C VIN = 3.6 V Conversion efficiency η (%) 95 90 CH2, CH3 : OFF 85 80 75 70 65 60 0 50 100 150 200 250 300 IO1 ≤ 80 mA: discontinuance mode Load current IO1 (mA) Conversion Efficiency vs. Load Current (CH2) 100 TA = +25 °C VIN = 3.6 V Conversion efficiency η (%) 95 90 CH1, CH3 : OFF 85 80 75 70 65 60 0 100 200 300 400 500 IO1 ≤ 120 mA: discontinuance mode Load current lO2 (mA) (Continued) 27 MB39A103 Conversion Efficiency vs. Load Current (CH3, CH4) 100 Conversion efficiency η (%) 95 90 85 80 75 70 65 60 0 10 20 30 CH4 CH3 TA = +25 °C VIN = 3.6 V VO3-1 = 10 mA VO4-1 = 10 mA VO4-3 = −5 mA CH1, CH2 : OFF CH1 to CH3 : OFF Note: CH3 and CH4 are discontinuance mode. 40 50 Load current IO3-2, IO4-2 (mA) (Continued) 28 MB39A103 (Continued) Switching Wave Form (CH1) VB1(V) 6 4 2 0 VC1(V) 5 0 −5 TA = +25 °C VIN = 4 V CTL = 3 V 0 1 2 3 4 5 6 7 8 9 10 t (µs) Switching Wave Form (CH2) VB2 (V) 1 0 −1 −2 VC2 (V) 10 5 0 TA = +25 °C VIN = 4 V CTL = 3 V 0 1 2 3 4 5 6 7 8 9 10 t (µs) 29 MB39A103 ■ USAGE PRECAUTION • Printed circuit board ground lines should be set up with consideration for common impedance. • Take appropriate static electricity measures. • Containers for semiconductor materials should have anti-static protection or be made of conductive material. • After mounting, printed circuit boards should be stored and shipped in conductive bags or containers. • Work platforms, tools, and instruments should be properly grounded. • Working personnel should be grounded with resistance of 250 kΩ to 1 MΩ between body and ground. • Do not apply negative voltages. The use of negative voltages below –0.3 V may create parasitic transistors on LSI lines, which can cause abnormal operation. ■ ORDERING INFORMATION Part number MB39A103PFT MB39A103PV3 Package 30-pin plastic TSSOP (FPT-30P-M04) 32-pad plastic BCC (LCC-32P-M15) Remarks 30 MB39A103 ■ PACKAGE DIMENSIONS 30-pin plastic TSSOP (FPT-30P-M04) 7.80±0.10(.307±.004) "A" Details of "A" part 0~8° 1.10(.043) MAX 4.40 –0.10 6.40±0.10 +.008 .173 –.004 (.252±.004) 0.25(.010) +0.20 0.60±0.10 (.024±.004) INDEX 0.10±0.05 (.004±.002) 0.50(.020) 0.20±0.03 (.008±.001) 0.3865(.0152) 0.127±0.03 (.005±.001) 0.10(.004) 7.00(.276) 0.90±0.05 (.035±.002) 0.3865(.0152) C 2001 FUJITSU LIMITED F30007SC-1-1 Dimensions in mm (inches) Note: The values in parentheses are reference values. (Continued) 31 MB39A103 (Continued) 32-pad plastic BCC (LCC-32P-M15) 4.25(.167)TYP 0.50(.020)TYP 5.00±0.10(.197±.004) 25 17 0.80(.031)MAX (Mount height) 17 0.50±0.10 (.020±.004) 25 INDEX AREA 5.00±0.10 (.197±.004) 4.25(.167) TYP 0.50(.020) TYP 0.50±0.10 (.020±.004) 3.00(.118) REF "A" "C" "B" 1 9 0.075±0.025 (.003±.001) (Stand off) 9 3.00(.118)REF 1 Details of "A" part 0.05(.002) 0.14(.006) MIN 0.55±0.06 (.022±.002) Details of "B" part C0.2(.008) 0.55±0.06 (.022±.002) Details of "C" part 0.55±0.06 (.022±.002) 0.30±0.06 (.012±.002) 0.55±0.06 (.022±.002) 0.55±0.06 (.022±.002) C 2005 FUJITSU LIMITED C32067S-c-1-1 Dimensions in mm (inches) Note: The values in parentheses are reference values. 32 MB39A103 FUJITSU LIMITED All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information, such as descriptions of function and application circuit examples, in this document are presented solely for the purpose of reference to show examples of operations and uses of Fujitsu semiconductor device; Fujitsu does not warrant proper operation of the device with respect to use based on such information. When you develop equipment incorporating the device based on such information, you must assume any responsibility arising out of such use of the information. Fujitsu assumes no liability for any damages whatsoever arising out of the use of the information. Any information in this document, including descriptions of function and schematic diagrams, shall not be construed as license of the use or exercise of any intellectual property right, such as patent right or copyright, or any other right of Fujitsu or any third party or does Fujitsu warrant non-infringement of any third-party’s intellectual property right or other right by using such information. Fujitsu assumes no liability for any infringement of the intellectual property rights or other rights of third parties which would result from the use of information contained herein. The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for use accompanying fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for use requiring extremely high reliability (i.e., submersible repeater and artificial satellite). Please note that Fujitsu will not be liable against you and/or any third party for any claims or damages arising in connection with above-mentioned uses of the products. Any semiconductor devices have an inherent chance of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Law of Japan, the prior authorization by Japanese government will be required for export of those products from Japan. F0511 © 2005 FUJITSU LIMITED Printed in Japan