MB39A126PFV-G-BND-ERE1 Fujitsu Semiconductor America Inc, MB39A126PFV-G-BND-ERE1 Datasheet
MB39A126PFV-G-BND-ERE1
Specifications of MB39A126PFV-G-BND-ERE1
MB39A126PFV-G-ERE1
Available stocks
Related parts for MB39A126PFV-G-BND-ERE1
MB39A126PFV-G-BND-ERE1 Summary of contents
Page 1
FUJITSU MICROELECTRONICS DATA SHEET ASSP for Power Supply Applications (Secondary battery) DC/DC Converter IC for Charging Li-ion Battery MB39A125/126 ■ DESCRIPTION MB39A125/126 is a DC/DC converter IC for charging Li-ion battery, which is suitable for down-conversion, and uses pulse width ...
Page 2
MB39A125/126 (Continued) • External output voltage setting resistor : MB39A125 • Built-in output voltage setting resistor : MB39A126 • Built-in charge stop function at low VCC • Output voltage setting accuracy : ± 0.74% (Ta = −10 °C to +85 ...
Page 3
PIN ASSIGNMENTS • MB39A125 −INC2 OUTC2 +INE2 −INE2 ACOK VREF ACIN −INE1 +INE1 OUTC1 OUTD −INC1 (TOP VIEW ...
Page 4
MB39A125/126 (Continued) 28 N.C. 1 GND 2 +INC2 3 N.C. 4 −INC2 5 OUTC2 6 +INE2 7 8 Note : Connect IC’s radiation board at bottom side to potential of GND. 4 (TOP VIEW ...
Page 5
MB39A126 −INC2 OUTC2 +INE2 −INE2 ACOK VREF ACIN −INE1 +INE1 OUTC1 SEL −INC1 (TOP VIEW ...
Page 6
MB39A125/126 (Continued) 28 N.C. 1 GND 2 +INC2 3 N.C. 4 −INC2 5 OUTC2 6 +INE2 7 8 Note : Connect IC’s radiation board at bottom side to potential of GND. 6 (TOP VIEW ...
Page 7
PIN DESCRIPTIONS • MB39A125 : SSOP-24 Pin No. Pin Name I/O −INC2 OUTC2 O +INE2 3 I −INE2 ACOK O 6 VREF O 7 ACIN I −INE1 8 I +INE1 ...
Page 8
MB39A125/126 • MB39A125 : QFN-28 Pin No. Pin Name I/O ⎯ 1 N.C. ⎯ 2 GND +INC2 3 I ⎯ 4 N.C. −INC2 OUTC2 O +INE2 7 I −INE2 ACOK O 10 VREF O ...
Page 9
MB39A126 : SSOP-24 Pin No. Pin Name I/O −INC2 OUTC2 O +INE2 3 I −INE2 ACOK O 6 VREF O 7 ACIN I −INE1 8 I +INE1 OUTC1 O 11 ...
Page 10
MB39A125/126 • MB39A126 : QFN-28 Pin No. Pin Name I/O ⎯ 1 N.C. ⎯ 2 GND +INC2 3 I ⎯ 4 N.C. −INC2 OUTC2 O +INE2 7 I −INE2 ACOK O 10 VREF O ...
Page 11
BLOCK DIAGRAMS • MB39A125 −INE1 8 <Current Amp1> OUTC1 +INC1 ×20 −INC1 − 12 +INE1 9 −INE2 4 <Current Amp2> 2 OUTC2 + 24 +INC2 ×20 −INC2 − 1 +INE2 3 FB123 15 −INE3 16 OUTD ...
Page 12
MB39A125/126 • MB39A126 −INE1 8 <Current Amp1> OUTC1 +INC1 ×20 −INC1 − 12 +INE1 9 −INE2 4 <Current Amp2> 2 OUTC2 + 24 +INC2 ×20 −INC2 − 1 +INE2 3 FB123 15 R1 −INE3 16 R2 SEL ...
Page 13
ABSOLUTE MAXIMUM RATINGS Parameter Symbol Power supply voltage V CC Output current I OUT Peak output current I OUT Power dissipation P D Storage temperature T STG *1 : When mounted on a 10cm square epoxy double-sided ...
Page 14
MB39A125/126 ■ RECOMMENDED OPERATION CONDITIONS Parameter Power supply voltage Reference voltage Output current VH terminal output current Input voltage CTL terminal input voltage Output current Peak output current ACIN terminal input Voltage ACOK terminal output voltage ACOK terminal output current ...
Page 15
ELECTRICAL CHARACTERISTICS Sym- Parameter bol V REF1 V REF2 Output voltage V REF1 1. Reference V REF2 voltage block Input stability Line [REF] Load stability Load Output current Ios at short circuit 2. V Threshold TLH Under voltage voltage ...
Page 16
MB39A125/126 Sym- Parameter bol Input I INE current Voltage Av gain Frequency BW bandwidth V Output FBH voltage V FBL Output source I SOURCE current Output sink I SINK current V TH1 V 5-2. TH2 Error amplifier V TH3 Threshold ...
Page 17
Sym- Parameter Pin No. bol V ON 5-2. SEL input Error voltage amplifier V block OFF [Error Amp3] I Input SELH current I SELL Input offset V IO voltage I +INCH I- Input INCH current 6. I +INCL Current Detection ...
Page 18
MB39A125/126 Sym- Parameter bol Frequency BW 6. bandwidth Current V Output OUTCH Detection voltage Amplifier V OUTCL Block Output [Current source cur- I SOURCE Amp1, rent Current Output sink Amp2] I SINK current PWM Comp. Threshold Block ...
Page 19
Sym- Parameter bol ACOK terminal I LEAK output leak current ACOK terminal 10 output ON AC Adapter resistance Voltage Detection XACOK Block terminal I LEAK [AC Comp.] output leak current XACOK terminal R ON output ON resistance ...
Page 20
MB39A125/126 ■ TYPICAL CHARACTERISTICS Power Supply Current vs. Power Supply Voltage Power supply voltage V Reference Voltage vs. Power Supply Voltage ...
Page 21
Triangular Wave Oscillation Frequency vs. Operating Ambient Temperature 340 330 320 310 300 290 280 270 260 −40 − Operating ambient temperature Ta ( °C) <MB39A125> Error Amplifier Threshold Voltage vs. Operating Ambient Temperature 4.28 4.26 4.24 ...
Page 22
MB39A125/126 Error Amplifier, Gain, Phase vs. Frequency −10 −20 −30 −40 100 1k 10k 100k Frequency f (Hz) Error Amplifier, Gain, Phase vs. Frequency −10 −20 −30 −40 100 1k ...
Page 23
Power Dissipation vs. Operating Ambient Temperature (SSOP) 800 740 700 600 500 400 300 200 100 0 −40 − Operating ambient temperature Ta ( °C) Power Dissipation vs. Operating Ambient Temperature (QFN) 4000 3700 3500 3000 ...
Page 24
MB39A125/126 ■ FUNCTIONAL DESCRIPTION 1. DC/DC Converter Block (1) Reference voltage block (REF) The reference voltage circuit uses the voltage supplied from the VCC terminal (pin 21) to generate a temperature compensated, stable voltage (5.0 V Typ) used as the ...
Page 25
Current detection amplifier block (Current Amp2) The current detection amplifier (Current Amp2) detects a voltage drop which occurs between both ends of the output sense resistor (RS1) due to the flow of the AC adapter current, using the +INC2 ...
Page 26
MB39A125/126 2. Protection Functions (1) Under voltage lockout protection circuit block (UVLO) The transient state or a momentary decrease in power supply voltage or internal reference voltage (VREF) , which occurs when the power supply (VCC) is turned on, may ...
Page 27
Detection Function (1) AC adapter voltage detection block (AC Comp.) When ACIN terminal (pin 7) voltage is lower than 1.3 V (Typ adapter voltage detection block (AC Comp.) outputs “Hi-Z” level to the ACOK terminal (pin 5) ...
Page 28
MB39A125/126 ■ CONSTANT CHARGING VOLTAGE AND CURRENT OPERATION MB39A125/126 is DC/DC converter with the pulse width modulation (PWM) . MB39A125 is in the output voltage control loop, the Error Amp3 compares internal voltage reference voltage 4.2 V and DC/DC converter ...
Page 29
SETTING THE CHARGE VOLTAGE MB39A125 The charging voltage (DC/DC output voltage) can be set by connecting external output voltage setting resistors (R3, R4) to the −INE3 terminal (pin 16 sure to select a resistor value that allows ...
Page 30
MB39A125/126 MB39A126 The setting of the charge voltage is switched to 3cells or 4cells by the SEL terminal (pin 11) . Charge voltage is set to 16.8 V when SEL terminal is “H” level, and charge voltage is set to ...
Page 31
SETTING THE CHARGE CURRENT The charge current value can be set at the analog voltage value of the +INE1 terminal (pin 9) . Charge current formula : Ichg ( Charge current setting voltage : V ■ SETTING ...
Page 32
MB39A125/126 ■ SETTING THE SOFT-START TIME Soft-start function prevents rush current at start- when the Soft-start capacitor (Cs) is connected to the CS terminal (pin 22) . This IC charges external soft-start capacitor (Cs) with 10 µA after ...
Page 33
TRANSIENT RESPONSE AT LOAD-STEP The constant voltage control loop and the constant current control loop are independent. With the load-step, these two control loops change. The battery voltage and current overshoot are generated by the delay time of the ...
Page 34
MB39A125/126 ■ AC ADAPTER DETECTION FUNCTION When ACIN terminal (pin 7) voltage is lower than 1.3 V (Typ adapter voltage detection block (AC Comp.) outputs “Hi-Z” level to the ACOK terminal (pin 5) and outputs “L” level to ...
Page 35
Automatic changing system power supply between AC adapter and battery The AC adapter voltage is detected and external switch at input side and battery side can be changed automat- ically with the connection as follows. Connect CTL terminal (pin ...
Page 36
MB39A125/126 (3) Battery selector function When control signal from microcomputer etc. is input to ACIN terminal (pin 7) as shown in the following diagram, ACOK terminal (pin 5) output voltage and XACOK terminal (pin 18) output voltage are controlled to ...
Page 37
When AC Comp. is not used When AC Comp. (ACIN (pin 7) , ACOK (pin 5) , and XACOK (pin 18) terminals) is not used as follows, connect the ACIN (pin 7) , ACOK (pin 5) , and XACOK ...
Page 38
MB39A125/126 ■ PHASE COMPENSATION • Example Circuit V IN <Error Amp 3> −INE3 − 4 FB123 Inductance RL : Equivalent series resistance of inductance Co : Capacity of condenser ESR : Equivalent ...
Page 39
Frequency Characteristics of Error Amp Total frequency characteristic Gain −10 −20 −30 −40 −50 −60 −70 −80 − 100 Frequency [Hz] • Frequency Characteristics of DC/DC converter ...
Page 40
MB39A125/126 • Frequency Characteristics of LC filter which is using low ESR Frequency characteristic of power output LC filter (DC gain is included −10 −20 −30 −40 Phase −50 −60 ...
Page 41
PROCESSING WITHOUT USING OF THE CURRENT AMP1 AND AMP2 When Current Amp is not used, connect the +INC1 terminal (pin 13) , +INC2 terminal (pin 24) , −INC1 terminal (pin 12) , and −INC2 terminal (pin 1) to VREF ...
Page 42
MB39A125/126 ■ PROCESSING WITHOUT USING OF THE CS TERMINAL When soft-start function is not used, leave the CS terminal (pin 22) open. • Connection when no soft-start time is specified 42 ”open” ...
Page 43
I/O EQUIVALENT CIRCUIT • <Reference voltage block> 21 VCC 1.235 V + − ESD 6 37.8 protection kΩ element 12.35 protection kΩ element 23 GND • <Soft-start block> • <Triangular wave oscillator block> VREF VCC (5.0 V) VREF (5.0 ...
Page 44
MB39A125/126 (Continued) • <PWM comparator block> VCC FB123 GND • <AC adapter voltage detection block> ACIN 7 VCC VREF (5.0 V) GND • <Bias voltage block> • <Invalidity current prevention block> <MB39A125> VCC 19 GND 44 • <Output block> VCC ...
Page 45
APPLICATION EXAMPLE 1 • MB39A125 R17 RS1 51 0.015 kΩ Ω R18 24 R14 kΩ 15 kΩ R15 68 kΩ R16 10 kΩ −INE1 100 kΩ 6800 kΩ OUTC1 ...
Page 46
MB39A125/126 ■ PARTS LIST 1 • MB39A125 COMPONENT ITEM Q1, Q2, Q3 Pch FET D1 Diode L1 Inductor C1, C3, C4 Ceramics Condenser C6 Ceramics Condenser C7, C12 Ceramics Condenser C8, C10 Ceramics Condenser C9, C11 Ceramics Condenser C13 Ceramics ...
Page 47
APPLICATION EXAMPLE 2 • MB39A126 R17 RS1 51 kΩ 0.015 Ω R18 24 R14 kΩ 15 kΩ R15 68 kΩ R16 10 kΩ −INE1 6800 pF 100 kΩ kΩ OUTC1 ...
Page 48
MB39A125/126 ■ PARTS LIST 2 • MB39A126 COMPONENT ITEM Q1, Q2, Q3 Pch FET D1 Diode L1 Inductor C1, C3, C4 Ceramics Condenser C6 Ceramics Condenser C7, C12 Ceramics Condenser C8, C10 Ceramics Condenser C9, C11 Ceramics Condenser C13 Ceramics ...
Page 49
SELECTION OF COMPONENTS • Pch MOS FET The Pch MOS FET for switching use should be rated for at least +20% more than the input voltage. To minimize continuity loss, use a FET with low R frequency operation, on-cycle ...
Page 50
MB39A125/126 = I × R × Duty (ON × 0.018 × 0.672 0.109 W × I × tr × fosc (ON × ...
Page 51
I × R × Duty (ON × 0.018 × 0.572 0.093 W × I × tr × fosc (ON × 3 ...
Page 52
MB39A125/126 Inductance value : L − Vo ≥ 16.8 V output Example) − Vo (Max) ≥ × (25 − 16.8) ≥ × 300 × 10 ...
Page 53
V output Vo ≥ OFF 2L 12.6 1 ≥ × 2 × 15 × 10 300 × 10 −6 ≥ 0. determine whether the current through the inductor is within rated values necessary ...
Page 54
MB39A125/126 Peak-to-peak Value 16.8 V output − ∆ − 16 × 15 × 10 300 × 10 − 1.22 A 12.6 V output − ...
Page 55
V output Vo ≥ Io × (1 − ≥ 3 × (1 − 0.572) ≥ 1.284 A 16.8 V output Vo ≥ ( OFF 2L ≥ 3.6 ...
Page 56
MB39A125/126 • Input current sense resistor Please note the following in selecting the input current sense resistance. First of all, meet the electric power to the flowing current. However, the conversion efficiency deteriorates because the loss in the sense resistance ...
Page 57
REFERENCE DATA Conversion efficiency vs. Charging current (Constant Voltage mode) 100 16.8 V setting 55 50 0.01 0.1 Charging current I O Conversion efficiency vs. Charging voltage ...
Page 58
MB39A125/126 Switching waveform (Constant Voltage Mode) = 12.6 V setting V O OUT (V) OUT Pch Drain Pch (V) Drain 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 (µs) Switching ...
Page 59
Soft-start operating waveform (Constant Current Mode setting (A) SW2 = OFF CTL ...
Page 60
MB39A125/126 (Continued) Load-step response operation waveform (C.V mode → C.C mode (ms Load-step response operation waveform (C.V mode ...
Page 61
... 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 MB39A125PFV MB39A125WQN MB39A126PFV MB39A126WQN Package 24-pin plastic SSOP (FPT-24P-M03) 28-pin plastic QFN (LCC-28P-M11) ...
Page 62
MB39A125/126 ■ PACKAGE DIMENSIONS 24-pin plastic SSOP (FPT-24P-M03 7.75±0.10(.305±.004) 24 INDEX 1 0.65(.026) 0.24 .009 0.10(.004) 0.10(.004) 2003 FUJITSU LIMITED F24018S-c-4 Note Resin protrusion. (Each side : +0.15 (.006) Max). Note 2) *2 ...
Page 63
QFN (LCC-28P-M11) 5.00 ± 0.10 (.197 ± .004) INDEX AREA 0.08(.003) 2004 FUJITSU LIMITED C28068Sc-2-1 C 3.50 ± 0.10 5.00 ± 0.10 (.197 ± .004) (.138 ± .004) 3-R0.20 (3-R.008) 0.50(.020) TYP 0.80(.032) MAX +0.05 0.20(.008) 0.02 ...
Page 64
FUJITSU MICROELECTRONICS LIMITED Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0722, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3387 http://jp.fujitsu.com/fml/en/ For further information please contact: North and South America FUJITSU MICROELECTRONICS AMERICA, INC. 1250 E. Arques Avenue, M/S 333 Sunnyvale, CA ...