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PDF MB3832A Data sheet ( Hoja de datos )
| Número de pieza | MB3832A | |
| Descripción | DC/DC Converter IC for Charging | |
| Fabricantes | Fujitsu Media Devices | |
| Logotipo |  |
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FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27701-2E
ASSP For Power Management Applications
(Secondary battery)
DC/DC Converter IC for Charging
MB3832A
s DESCRIPTION
The MB3832A is a pulse width modulation (PWM) DC/DC converter IC, incorporating a current detector amplifier
and error amplifiers (2 circuits) to control the output voltage and current independently. It is suitable for down-
conversion.
With an on-chip reference voltage generator, the MB3832A is best suited for use in applications such as lithium-
ion battery (1-cell to 3-cell) chargers.
s FEATURES
• High precision reference voltage source: 2.5 V ± 0.5% (+25°C)
: 2.5 V ± 1.0% (–10°C to +85°C)
• High frequency operating capability: 500 kHz max.
• Wide operating supply voltage range: 3.6 V to 18 V
• On-chip current detector amplifier with wide in-phase input voltage range: 0 V to VCC
• On-chip standby function
• On-chip triangular waveform oscillator capable of operating in external synchronization
• On-chip, timer-latch short-circuit protection circuit
• Internal totem-pole output stage supporting P-channel MOS FETs and PNP transistors
s PACKAGE
20-pin plastic SSOP
(FPT-20P-M03)
1 page  
MB3832A
s ABSOLUTE MAXIMUM RATINGS
Parameter
Power supply voltage
Control input voltage
Output current
Peak output current
Allowable dissipation
Storage temperature
Symbol
Condition
VCC
VCTL
IO
IO
PD
Tstg
—
—
OUT pin, DC
OUT pin,
Duty 5%
Ta +25°C
—
Rating
Min.
Max.
— 20
— 20
— 50
— 600
— 540*
–55 +125
Unit
V
V
mA
mA
mW
°C
* : When mounted on a 10 cm-square dual-sided epoxy base board
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.
s RECOMMENDED OPERATING CONDITIONS
Parameter
Power supply voltage
Reference voltage output
current
Input voltage
Control input voltage
SYNC input voltage
Output current
Oscillatior frequency
Timing capacitance
Timing resistance
Short detection capacitance
Operating temperature
Symbol
Condition
VCC
IOR
VIN
VCTL
VSYNC
IO
fOSC
CT
RT
CSCP
Ta
—
—
+IN1, –IN1, +IN2,
–IN2 pin
+INC, –INC pin
CTL pin
SYNC pin
OUT pin, DC
—
—
—
—
—
Min.
3.6
–1
0
0
0
0
—
10
100
8.2
—
–30
Value
Typ.
16
—
Max.
18
0
Unit
V
mA
— VCC – 0.9 V
— VCC V
— 18 V
— VCC V
— 30 mA
200 500 kHz
390
2200
pF
12 51 kΩ
0.1 1.0 µF
+25 +85 °C
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.
5
5 Page 
MB3832A
Error amp. gain, phase vs. frequency
characteristics
40
30
AV
VCC = 16 V
CTL = 5 V
180
Ta = +25 °C 135
20 90
φ
10 45
00
−10 −45
−20 −90
−30 −135
−40 −180
100 1 k 10 k 100 k 1 M 10 M
Frequency f (Hz)
5V
11 kΩ
240 kΩ
1 µF
IN 7 −
2.4 kΩ (14)
6
11 kΩ
8+
(15)
(13) Err Amp.1
2.5 V (Err Amp.2)
OUT
Current detector amp. gain, phase vs.
frequency characteristics
50
40 180
30 AV 135
20 90
10 45
00
−10 −45
−20 φ −90
−30 −135
−40 −180
−50
100 1 k 10 k 100 k 1 M 10 M
Frequency f (Hz)
IN
0.1 V
12.6 V
Current Amp.
10 +
×2
9−
+ × 12.5
12 OUT
−
Current detector amp. output voltage vs.
input voltage characteristics
3.0 VCC = 16 V
V+INC = V−INC + 0.1 V
Ta = +25 °C
2.8
2.6
2.4
2.2
2.0
0
4 8 12 16
Inverting input voltage (V)
(Continued)
11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet MB3832A.PDF ] | |
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