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参数资料
| 型号： | DS232AR-N |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDSO16 |
| 封装： | 0.150 INCH, SOIC-16 |
| 文件页数： | 5/16页 |
| 文件大小： | 224K |
| 代理商： | DS232AR-N |
MAX1501
Highly Integrated, Linear Battery Charger with
Thermal Regulation for Portable Applications
13
Maxim Integrated
Thermal-Regulation Selection
Set the regulated die temperature of the MAX1501 with
the TEMP three-level logic input. The MAX1501
reduces the charge current to limit the die temperature
to the value set by TEMP. The MAX1501 operates nor-
mally while the thermal loop is active. An active thermal
loop does not indicate a fault condition. TEMP allows
the MAX1501 to maximize the charge current while pro-
viding protection against excessive power dissipation.
Connect TEMP to GND to regulate the die temperature
at +95
°C. Leave TEMP floating to regulate the die tem-
perature at +115
°C. Connect TEMP to VL to regulate
the die temperature at +135
°C.
Top-Off-Current Selection
Set the top-off-current threshold in the Li+ and
NiMH/NiCd charge modes with the FULLI three-level
logic input. The top-off-current threshold determines
when RLED turns off and GLED turns on, indicating the
charge status of the battery.
Connect FULLI to GND to set the top-off-current thresh-
old to 10% of the fast-charge current. Connect FULLI to
VL to set the top-off-current threshold to 20% of the
fast-charge current. Leave FULLI floating to set the top-
off-current threshold to 30% of the fast-charge current.
Charge-Timer Selection (MAX1501 Only)
Set the maximum charging time with the TMAX three-
level logic input. TMAX limits the duration of charging to
protect the battery from overcharging. Connect TMAX
to GND to set the maximum charging time to 3 hours.
Leave TMAX floating to set the maximum charging time
to 4.5 hours. Connect TMAX to VL to set the maximum
charging time to 6 hours.
Capacitor Selection
Connect a ceramic capacitor from BATT to GND for
proper stability. Use a 10F X5R ceramic capacitor for
most applications.
Connect IN and INP together and bypass to GND with
a 1F ceramic capacitor. Use a larger input bypass
capacitor for high input voltages or high charging cur-
rents to reduce supply noise.
Thermal Considerations
The MAX1501 is available in a thermally enhanced thin
QFN package with exposed paddle. Connect the
exposed paddle of the MAX1501 to a large copper
ground plane to provide a thermal contact between the
device and the circuit board. The exposed paddle
transfers heat away from the device, allowing the
MAX1501 to charge the battery with maximum current,
while minimizing the increase in die temperature.
Application Circuits
Figure 5 shows the MAX1501 as a stand-alone Li+ bat-
tery charger. The 2.8k
Ω resistor connected to SETI sets
a charging current of 500mA.
Figure 6 shows the MAX1501 as a P-based Li+ battery
charger. Drive CHGEN low to charge the battery. Drive
CHGEN high to disable the charger. Connect a 100k
Ω
pullup resistor from ACOK to the logic supply voltage of
the P to detect the presence of an input supply. The
logic supply voltage must be less than 5.5V.
MAX1501/MAX1501Z
1
μF
4.5V TO 6.5V
2.8k
Ω
IN
INP
TEMP
FULLI
TMAX/I.C.
SETI
GND
GLED
RLED
10
μF
4.2V 1-CELL Li+
BATT
VL
SELV
MODE
CHGEN
ACOK
AC
ADAPTER
Figure 5. Stand-Alone Li+ Battery Charger
MAX1501/MAX1501Z
1
μF
4.5V TO 6.5V
2.8k
Ω
IN
INP
SETI
GND
MODE
GND
GLED
RLED
10
μF
4.2V 1-CELL Li+
BATT
VL
SELV
TMAX/I.C.
TEMP
FULLI
ACOK
AC
ADAPTER
μP
VI/O
CHGEN
RPULLUP
Figure 6. P-Based Li+ Battery Charger
相关PDF资料 |
PDF描述 |
|---|---|
| DS232AS-N | LINE TRANSCEIVER, PDSO16 |
| DS232AS | LINE TRANSCEIVER, PDSO16 |
| DS232A | LINE TRANSCEIVER, PDIP16 |
| DS2404S-001 | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
| DS2404B | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS232AR-N/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC TXRX DL RS-232 5V IND 16-SOIC |
| DS232AR-N/T&R | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| DS232AR-N+ | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| DS232AR-N+T&R | 制造商:Maxim Integrated Products 功能描述:IC TXRX DUAL RS-232 5V 16-SOIC |
| DS232AR-N+T&R | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
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