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参数资料
| 型号： | LT1511ISW |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHRGR CONST I/V 3A24SOIC |
| 标准包装： | 32 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子，镍镉，镍氢 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC |
| 包装： | 管件 |
LT1511
PI N FU N CTIO N S
GND (Pins 1, 4, 5, 7, 16, 23, 24): Ground Pin.
SW (Pin 2): Switch Output. The Schottky catch diode must
be placed with very short lead length in close proximity to
SW pin and GND.
BOOST (Pin 3): This pin is used to bootstrap and drive the
switch power NPN transistor to a low on-voltage for low
power dissipation. In normal operation, V BOOST = V CC +
V BAT when switch is on. Maximum allowable V BOOST is
55V.
UV (Pin 6): Undervoltage Lockout Input. The rising thresh-
old is at 6.7V with a hysteresis of 0.5V. Switching stops in
undervoltage lockout. When the supply (normally the wall
adapter output) to the chip is removed, the UV pin has to
be pulled down to below 0.7V (a 5k resistor from adapter
output to GND is required) otherwise the reverse battery
current drained by the chip will be approximately 200 μ A
instead of 3 μ A. Do not leave UV pin floating. If it is
connected to V IN with no resistor divider, the built-in 6.7V
undervoltage lockout will be effective.
OVP (Pin 8): This is the input to the amplifier VA with a
threshold of 2.465V. Typical input current is about 3nA out
of pin. For charging lithium-ion batteries, VA monitors the
battery voltage and reduces charging when battery voltage
reaches the preset value. If it is not used, the OVP pin
should be grounded.
CLP (Pin 9): This is the positive input to the supply current
limit amplifier CL1. The threshold is set at 100mV. When
used to limit supply current, a filter is needed to filter out
the 200kHz switching noise.
CLN (Pin 10): This is the negative input to the amplifier
CL1.
COMP1 (Pin 11): This is the compensation node for the
amplifier CL1. A 200pF capacitor is required from this pin
to GND if input current amplifier CL1 is used. At input
adapter current limit, this node rises to 1V. By forcing
COMP1 low with an external transistor, amplifier CL1 will
be defeated (no adapter current limit). COMP1 can source
200 μ A.
6
SENSE (Pin 12): Current Amplifier CA1 Input. Sensing can
be at either terminal of the battery.
SPIN (Pin 13): This pin is for the internal amplifier CA1
bias. It has to be connected to R S1 as shown in the 3A
Lithium Battery Charger (Figure 1).
BAT (Pin 14): Current Amplifier CA1 Input.
COMP2 (Pin 15): This is also a compensation node for the
amplifier CL1. It gets up to 2.8V at input adapter current
limit and/or at constant-voltage charging.
UV OUT (Pin 17): This is an open collector output for
undervoltage lockout status. It stays low in undervoltage
state. With an external pull-up resistor , it goes high at valid
V CC . Note that the base drive of the open collector NPN
comes from CLN pin. UV OUT stays low only when CLN is
higher than 2V. Pull-up current should be kept under
100 μ A.
V C (Pin 18): This is the control signal of the inner loop of
the current mode PWM. Switching starts at 0.7V. Higher
V C corresponds to higher charging current in normal
operation. A capacitor of at least 0.33 μ F to GND filters out
noise and controls the rate of soft-start. To shut down
switching, pull this pin low. Typical output current is 30 μ A.
PROG (Pin 19): This pin is for programming the charging
current and for system loop compensation. During normal
operation, V PROG stays close to 2.465V. If it is shorted to
GND the switching will stop. When a microprocessor
controlled DAC is used to program charging current, it
must be capable of sinking current at a compliance up to
2.465V.
V CC (Pins 20, 21, 22): This is the supply of the chip. For
good bypass, a low ESR capacitor of 20 μ F or higher is
required, with the lead length kept to a minimum. V CC
should be between 8V and 28V and at least 3V higher than
V BAT . Undervoltage lockout starts and switching stops
when V CC goes below 7V. Note that there is a parasitic
diode inside from SW pin to V CC pin. Do not force V CC
below SW by more than 0.7V with battery present. All three
V CC pins should be shorted together close to the pins.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1511ISW#PBF | 功能描述:IC BATT CHRGR CONST I/V 3A24SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1511ISW#TR | 功能描述:IC CHARGER BATT CONST V/I 24SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1511ISW#TRPBF | 功能描述:IC BATT CHRGR CONST I/V 3A24SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1512 | 制造商:LINER 制造商全称:Linear Technology 功能描述:SEPIC Constant-Current/ Constant-Voltage Battery Charger |
| LT1512C | 制造商:LINER 制造商全称:Linear Technology 功能描述:SEPIC Constant-Current/ Constant-Voltage Battery Charger |
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