MM1357 查看數據表（PDF） - Mitsumi

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MM1357

Control of Lithium Ion Batteries (switching regulator secondary) (two cells)

Mitsumi 

MITSUMI

Control of Lithium Ion Batteries (switching regulator secondary) (two cells) MM1357

Recommended Operating Conditions

Item

Symbol

Ratings

Operating temperature

TOPR

-15~+80

Operating voltage

VOPR

* +2~+20

*The minimum operating voltage is under constant-current control

Units

°C

V

Electrical Characteristics (Except where noted otherwise, Ta=25°C, REG OUT=4V, VCC=8.4V)

Item

Symbol Measurement conditions

Min. Typ. Max. Units

VCC minimum input current

ICC Excluding REG OUT input current

0.25 0.40 mA

Amp input for voltage control

Input offset voltage

VIO

1 5 mV

Input bias current VFB+

IB+

20 250 nA

Input bias current VFB-

IB-

20 250 nA

Common-mode input voltage range VI

*

0.7

REG OUT

-0.7

V

Amp input for current control

ADJ1 pin input impedance

RADJ1

13

kΩ

ADJ2 pin input impedance

RADJ2

13

kΩ

CFB pin input impedance

RCFB

2

kΩ

Current limit 1

VCL1

High-current mode

310 320 330 mV

Current limit 2

VCL2

Low-current mode

137 145 153 mV

OUT pin input current 1

IS1 OUT=8.4V (voltage-control amp) 20

mA

OUT pin input current 2

IS2

OUT=4 V (voltage-control amp) 20

mA

OUT pin leakage current

IL

OUT=24V

2

µA

CC IN input impedance

RCI

100

kΩ

CC switching voltage L (VTR mode) VCL

2.6 V

CC switching voltage H (CHG mode) VCH

3.4

V

CC OUT output intake current

ICO1 On switching from low to high current mode

6

µA

CC OUT output current

ICO2 On switching from high to low current mode

0.5

mA

CC OUT output voltage range

VCO

0.4

3.6 V

Reference voltage

VREF

1.195 1.207 1.219 V

REG OUT output voltage variable range VREG

2.0

6.0 V

REG OUT maximum input current I max.

20

mA

REG OUT minimum input current I min.

1.0 mA

*Because there is an internal circuit for protection against shorts of external components, the common-mode

input voltage range is 0.7V to REG OUT-0.7V. Values are set such that overvoltages do not occur when

there is a short between VBF+ and REG OUT or between VFB- and GND.

Timing Chart

Timing chart for connection of a timing capacitor CT to CC OUT

With REG OUT at 4V and CT=0.1µF, TD is approx. 50mS.

CC-IN

8.4V

0

VTH level

4V

CC-OUT

0

VTH level

CSR

0.15V

0.32V

TD

CC IN

VTH

Low-current

mode

CC OUT

VTH

High-current

mode

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