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參數(shù)資料
| 型號： | MAX712 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | NiCd/NiMH Battery Fast-Charge Controllers |
| 中文描述： | NiCd/NiMH電池快速充電控制器 |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 168K |
| 代理商： | MAX712 |
M
NiCd/NiMH Battery
Fast-Charge Controllers
______________________________________________________________________________________
15
Linear-Mode, High S eries Cell Count
The absolute maximum voltage rating for the BATT+ pin
is higher when the MAX712/MAX713 are powered on. If
more than 11 cells are used in the battery, the BATT+
input voltage must be limited by external circuitry when
DC IN is not applied (Figure 15).
Effic ienc y During Disc harge
The current-sense resistor, R
SENSE
, causes a small
efficiency loss during battery use. The efficiency loss is
significant only if R
SENSE
is much greater than the
battery stack’s internal resistance. The circuit in Figure
16 can be used to shunt the sense resistor whenever
power is removed from the charger.
S tatus Outputs
Figure 17 shows a circuit that can be used to indicate
charger status with logic levels. Figure 18 shows a
circuit that can be used to drive LEDs for power and
charger status.
Q1
D1
R2
150
DC IN
33k
Q2
500
DRV
BATT+
TO
BATTERY
POSITIVE
TERMINAL
MAX712
MAX713
Figure 15. Cascoding to Accommodate High Cell Counts for
Linear-Mode Circuits
100k
100k
MAX712
MAX713
D1
V+
GND
R
SENSE
>4 CELLS
LOW R
ON
LOGIC LEVEL
N-CHANNEL
POWER
MOSFET
*
*
Figure 16. Shunting R
SENSE
for Efficiency Improvement
10k
V
CC
OV = NOPOWER
5V = POWER
OV = FAST
V
CC
= TRICKLE OR
OPOWER
MAX713
V+
FASTCHG
MAX712
Figure 17. Logic-Level Status Outputs
V+
MAX712
MAX713
R1
470
MIN
FASTCHG
DC IN
CHARGE POWER
FAST CHARGE
Figure 18. LED Connection for Status Outputs
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX712_02 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:NiCd/NiMH Battery Fast-Charge Controllers |
| MAX712_08 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:NiCd/NiMH Battery Fast-Charge Controllers |
| MAX712_13 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述: |
| MAX7129 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:4-1/2 Digit Single-Chip A/D Converter with LCD Driver |
| MAX7129AC/D | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Analog-to-Digital Converter， 4-1/2-Digit |
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