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參數(shù)資料
| 型號： | MAX1736EUT41-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SOT23, Single-Cell Li+ Battery Charger for Current-Limited Supply |
| 中文描述： | BATTERY CHARGE CONTROLLER, PDSO6 |
| 封裝： | SOT-23, 6 PIN |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 179K |
| 代理商： | MAX1736EUT41-T |
FET are the minimum drain-source breakdown voltage
and the minimum turn-on threshold voltage (V
GS
).
Power dissipation during fast charge is approximately
R
DSON
I
CHG
2
, where I
CHG
is the current limit set by
the input power source. The minimum breakdown volt-
age (BV
DS
) must typically be two times the wall cube
’
s
open-circuit voltage. An even larger margin may be
necessary if the wall adapter has especially poor tran-
sient response. The MAX1736 can operate with input
voltages up to 22V.
BATT Capacitor
Bypass BATT with at least 1.5μF per amp of charge
current. If the battery is removed while the P-channel
MOSFET is on, a BATT voltage over 5V is quickly
sensed, and the FET is immediately turned off. In appli-
cations where the cell is removable, very large capaci-
tance values may increase transient currents when the
cell is replaced. Therefore, BATT capacitance in
excess of 100μF should be avoided. For best system
performance with large output capacitance, at least
0.47μF of the total capacitance should be low-ESR
ceramic.
C
CT
and C
GATE
Most applications will use the circuit of Figure 3 with
C
GATE
= 0.22μF, R
GATE
= 100k
, and C
CT
= 0.33μF.
C
GATE
, R
GATE
, and the internal 100μA pull-up and pull-
down current sources act to slow the switching of the P-
channel MOSFET. This prevents a wall cube with poor
transient response from subjecting V
IN
to excessive
voltage when the P-channel MOSFET turns off, and pre-
vents excessive current into the battery when the P-
channel MOSFET turns on. Excessive voltage at V
IN
can potentially damage the IC, input capacitor, and the
PMOS switch. Excessive current into the battery can
cause errors in the termination process of the MAX1736
(by raising the instantaneous battery voltage) and may
trip the battery
’
s protection circuitry.
In applications utilizing a wall cube with poor transient
response, increase the value of C
GATE
as needed to
M
SOT23, Single-Cell Li+ Battery Charger
for Current-Limited Supply
_______________________________________________________________________________________
7
SHUTDOWN
FET: OFF
EVERY
CYCLE
CHARGER
POWER
PRESENT
CHARGER
POWER
PRESENT
CHARGER
POWER REMOVED
(FROM ANY STATE)
CHARGER
POWER
PRESENT
TOP-OFF QUAL
FET: OFF
TOP-OFF
FET: PULSED
FAST-CHARGE
FET: ON
FAST-CHARGE QUAL
FET: OFF
V
BATT
> 4.2V
V
B
≥
V
B
V
B
IN
DETECTION
INTERVAL
EN
DISABLED
FET: OFF
PRECHARGE
FET: OFF
I
OUT
= -6mA
(FROM ANY STATE)
EN
Figure 2. State Machine
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1736EUT42-T | SOT23, Single-Cell Li+ Battery Charger for Current-Limited Supply |
| MAX1737 | Replaced by TMS320VC5506 : Digital Signal Processor 132-BQFP |
| MAX1737EVKIT | MAX1737 Evaluation Kit |
| MAX1737EEI | Stand-Alone Switch-Mode Lithium-Ion Battery-Charger Controller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1736EUT42 | 制造商:Maxim Integrated Products 功能描述:SOT23, SINGLE-CELL LI+ BATTERY CHARGER FOR CU - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX1736EUT42+T | 功能描述:電池管理 1Cell Li+ Battery Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1736EUT42-T | 功能描述:電池管理 1Cell Li+ Battery Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1736EUT-T | 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1737EEI | 功能描述:電池管理 Stand-Alone Switch-M L-Ion Battery Chargr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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