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參數(shù)資料
| 型號(hào)： | MM1357 |
| 廠商： | MITSUMI ELECTRIC CO LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Control of Lithium Ion Batteries Monolithic IC |
| 中文描述： | BATTERY CHARGE CONTROLLER, PDSO14 |
| 封裝： | SOP-14 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 149K |
| 代理商： | MM1357 |
MITSUMI
Control of Lithium Ion Batteries (switching regulator secondary) (two cells) MM1357
Item
Symbol
T
STG
T
OPR
V
CC
max.
P
D
Ratings
-
40~+125
-
20~+85
-
0.3~+24
350
Units
°C
°C
V
mW
Storage temperature
Operating temperature
Power supply voltage
Allowable loss
Absolute Maximun Ratings
Pin Description
Pin no. Pin name
Input/output
Function
1
OUT
Output
Output pin for charging control
An external photocoupler is controlled for constant-current, constant-voltage charging control.
Amp inverting input pin for current control
An external capacitor (approx. 0.1 μF) is connected between CFB and OUT, and
phase compensation used to improve oscillation.
Current detection pin
Current is detected via the voltage drop across an external resistance between
CSR and GND (R1), to control the charging current.
Charging current switching signal input pin
H (V
CC
) is the charging current 0.15V/R1, and L (GND) is the charging current
0.32V/R1. If for instance R1 is 0.1
, then switching is between 1.5A and 3.2A (typ.).
The switching voltage VTH is as follows.
When REG OUT is 2.5V, V
TH
is 2.05V typ.
When REG OUT is 4V, V
TH
is 3.0V typ.
When REG OUT is 5V, V
TH
is 3.7V typ.
Amp non-inverting input pin 1 for current control
The pin voltage is set at 0.15V typ. With CC-IN at H or open, the non-inverting input
pin of the current control amp is at 0.15 V.
By adjusting the pin voltage using an external resistance or by other means, the
charging current can be varied.
Power ground pin
Amp non-inverting input pin 2 for current control
The pin voltage is set at 0.32V typ. With CC-IN at L, the non-inverting input pin of the
current control amp is at 0.32V.
By adjusting the pin voltage using an external resistance or by other means, the
charging current can be varied.
Charging current switching signal output pin
Output is in phase with CC IN. By connecting an external capacitor between CC OUT
and REG OUT, a delay can be added only when the current switching CC IN goes
from H to L. For instance, when REG OUT is 4V, on connecting an 0.1μF capacitor
CC OUT becomes about 50mS (an example is shown in the Timing Chart section).
Signal ground pin
2
CFB
Input
3
CSR
Input
4
CC IN
Input
5
ADJ1
Input
6
P
-
GND
Input
7
ADJ2
Input
8
CC OUT
Output
9
S
-
GND
Input
10
VFB+
Input
Amp non-inverting input pin for voltage control
The charging voltage is set through the resistances at the VFB + pin and the VFB
-
pin.
11
V
CC
Input
Power supply input pin
Reference voltage circuit output pin
The reference voltage can be set between 2 and 6V. The input current to start the
reference voltage should be set to 1mA or greater.
Reference voltage circuit input pin
The VREF pin voltage is set at 1.2V typ. The REG OUT voltage can be set through the
resistances between REG OUT and VREF, and between VREF and GND.
Amp inverter input pin for voltage control
Amp inverting input pin for voltage control
The charging voltage can be set through the resistances at the VFB + pin and VFB
-
pin.
By connecting an external capacitor (approx. 0.1μF) between VFB and OUT for phase
compensation, oscillation can be improved.
12
REG OUT
Output
13
VREF
Input
14
VFB
-
Input
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