- 您现在的位置：买卖IC网 > PDF目录1846 > MAX745EAP+T (Maxim Integrated Products)IC BATTERY CHARGER LI+ 20-SSOP PDF资料下载
参数资料
| 型号： | MAX745EAP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHARGER LI+ 20-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 6 V ~ 24 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 带卷 (TR) |
Switch-Mode Lithium-Ion
Battery Charger
V REF / 2, the voltage limit is 4.2V. Table 1 defines the
battery cell count.
The battery limit voltage is set by the following:
where V REF = 4.2V and cell count is 1, 2, 3, 4 (Table 1).
The voltage-regulation loop is compensated at the CCV
pin. Typically, a series-resistor-capacitor combination
( )
V BATT REF +
?
?
? V ADJ ?
? ?
?
?
= cell count x V
?
? ?
Solving for V ADJ , we get:
? 1
? 2
9.523
? ?
V REF ? ?
?
?
? ?
can be used to form a pole-zero doublet. The pole
introduced rolls off the gain starting at low frequencies.
The zero of the doublet provides sufficient AC gain at
mid-frequencies. The output capacitor (C1) rolls off the
mid-frequency gain to below unity. This guarantees sta-
bility before encountering the zero introduced by the
C1 ’s equivalent series resistance (ESR). The GMV
V ADJ =
9.523 V BATT
( cell count )
? 9.023V REF
amplifier’s output is internally clamped to between one-
fourth and three-fourths of the voltage at REF.
Set V ADJ by choosing a value for R11 (typically 100k ? ),
and determine R3 by:
R3 = [1 - (V ADJ / V REF )] x R11 (Figure 1)
Table 1. Cell-Count Programming Table
Current Control
The charging current is set by a combination of the cur-
rent-sense resistor value and the SETI pin voltage. The
current-sense amplifier measures the voltage across
the current-sense resistor, between CS and BATT. The
current-sense amplifier’s gain is 6. The voltage on SETI
is buffered and then divided by 4. This voltage is com-
pared to the current-sense amplifier ’s output.
CELL0
GND
VL
GND
VL
CELL1
GND
GND
VL
VL
V IN
CELL COUNT
1
2
3
4
(UP TO 24V)
Therefore, full-scale current is accomplished by con-
necting SETI to REF. The full-scale charging current
(I FS) is set by the following:
I FS = 185mV / R1 (Figure 1)
C5
4.7 μ F
VL
DCIN
IN4148
D2
C6
0.1 μ F
C4
0.1 μ F
R16
R15
10k ?
REF
THM/SHDN
BST
DHI
LX
C7
0.1 μ F
M1A
1/2 IRF7303
L1
22 μ H
R3
100k ?
1%
THM 1
SETI
MAX745
DLO
1/2 IRF7303
M1B
D1
MBRS
340T3
D6
MBRS
340T3
R12
VADJ
PGND
CS
R1
0.2 ?
R11
100k ?
1%
C2, 0.1 μ F
R2
10k ?
C3
CCV
CCI
GND
IBAT
BATT
STATUS
BATTERY
C1
68 μ F
47nF
Figure 1. Standard Application Circuit
6
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX748AEPA+ | IC REG BUCK 3.3V 0.5A 8DIP |
| MAX749EPA+ | IC SUPPLY LCD BIAS ADJ 8-DIP |
| MAX750ACSA | IC REG BUCK ADJ 0.45A 8SOIC |
| MAX751CSA+T | IC REG BOOST 5V 0.15A 8SOIC |
| MAX754ESE+T | IC CNTRLR CONTRAST 16-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX745EVKIT | 功能描述:电池管理 Evaluation Kit for the MAX745 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX7461EUK | 制造商:Maxim Integrated Products 功能描述:LOSS-OF-SYNC ALARM - Rail/Tube |
| MAX7461EUK+ | 制造商:Maxim Integrated Products 功能描述:LOSS OF SYNC ALARM 5PIN SOT-23 - Rail/Tube |
| MAX7461EUK+T | 功能描述:视频 IC Loss-Of-Sync Alarm RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| MAX7461EUK-T | 功能描述:视频 IC RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。