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| 型号： | MAX8725ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 26/30页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATTERY 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | 充电管理 |
| 电池化学： | 多化学 |
| 电源电压： | 8 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 托盘 |
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Multichemistry Battery Chargers with Automatic
System Power Selector
Table 2. Recommended Components
REFERENCE QTY
DESCRIPTION
22μF ± 20%, 35V E-size low-ESR
REFERENCE QTY
DESCRIPTION
Dual n- and p-channel MOSFETs, 7A,
C1, C4
2
tantalum capacitors
AVX TPSE226M035R0300
30V and -5A, -30V, 8-pin SO, MOSFET
Fairchild FDS8958A or
Kemet T495X226M035AS
1μF ± 10%, 25V, X7R ceramic capacitors
(1206)
N1/P1
1
Single n-channel MOSFETs, +13.5A,
+30V FDS6670S and
Single p-channel MOSFETs, -13.5A,
C5, C15
2
Murata GRM31MR71E105K
Taiyo Yuden TMK316BJ105KL
-30V FDS66709Z
Single, p-channel, -11A, -30V, 8-pin SO
TDK C3216X7R1E105K
P2, P3, P4
3
MOSFETs
C9, C10
C11, C14,
C17
C12, C13,
C16
D4
D5
2
3
3
1
1
0.01μF ± 10%, 25V, X7R ceramic
capacitors (0402)
Murata GRP155R71E103K
TDK C1005X7R1E103K
0.1μF ± 10%, 25V, X7R ceramic
capacitors (0603)
Murata GRM188R71E104K
TDK C1608X7R1E104K
1μF ± 10%, 6.3V, X5R ceramic
capacitors (0603)
Murata GRM188R60J105K
Taiyo Yuden JMK107BJ105KA
TDK C1608X5R1A105K
Schottky diode, 0.5A, 30V SOD-123
Diodes Inc. B0530W
General Semiconductor MBR0530
ON Semiconductor MBR0530
25V ±1% zener diode
CMDZ5253B
R4
R5, R9, R21
R6
R7
R8
R11
R16
R19, R20
RS1
RS2
U1
1
2
1
1
1
1
1
2
1
1
1
Fairchild FDS6675
100k Ω , ± 5% resistor (0603)
10k Ω ± 1% resistors (0603)
590k Ω ± 1% resistor (0603)
196k Ω ± 1% resistor (0603)
1M Ω ± 5% resistor (0603)
1k Ω ± 5% resistor (0603)
33 Ω ± 5% resistor (0603)
10k Ω ± 5% resistors (0603)
0.01 Ω ± 1%, 0.5W sense resistor (2010)
Vishay Dale WSL2010 0.010 1.0%
IRC LRC-LR2010-01-R010-F
0.015 Ω ± 1%, 0.5W sense resistor (2010)
Vishay Dale WSL2010 0.015 1.0%
IRC LRC-LR2010-01-R015-F
MAX1909ETI/MAX8725ETI (28-pin thin
QFN-EP)
10μH, 4.4A inductor
L1
1
Sumida CDRH104R-100NC
TOKO 919AS-100M
Design Procedure
Table 2 lists the recommended components and refers
to the circuit of Figure 2. The following sections
describe how to select these components.
MOSFET Selection
MOSFETs P2 and P3 (Figure 1) provide power to the
system load when the AC adapter is inserted. These
devices may have modest switching speeds, but must
be able to deliver the maximum input current as set by
RS1. As always, care should be taken not to exceed the
device ’s maximum voltage ratings or the maximum
operating temperature.
The p-channel/n-channel MOSFETs (P1, N1) are the
switching devices for the buck controller. The guidelines
for these devices focus on the challenge of obtaining high
load-current capability when using high-voltage (>20V)
AC adapters. Low-current applications usually require
less attention. The high-side MOSFET (P1) must be able
to dissipate the resistive losses plus the switching losses
at both V DCIN(MIN) and V DCIN(MAX) .
Ideally, the losses at V DCIN(MIN) should be roughly equal
to losses at V DCIN(MAX) , with lower losses in between. If
the losses at V DCIN(MIN) are significantly higher than the
losses at V DCIN(MAX) , consider increasing the size of P1.
Conversely, if the losses at V DCIN(MAX) are significantly
higher than the losses at V DCIN(MIN), consider reducing
the size of P1. If DCIN does not vary over a wide range,
the minimum power dissipation occurs where the resistive
losses equal the switching losses.
26
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8725ETI+ | 功能描述:电池管理 Multichemistry Battery Charger 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 |
| MAX8725ETI+T | 功能描述:电池管理 Multichemistry Battery Charger 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 |
| MAX8725ETI-T | 功能描述:电池管理 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 |
| MAX8725EVKIT | 功能描述:电池管理 Evaluation Kit for the MAX8725 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 |
| MAX8726EUE | 功能描述:LCD 驱动器 RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
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