- 您现在的位置：买卖IC网 > PDF目录79675 > L9911V (STMICROELECTRONICS) BRUSH DC MOTOR CONTROLLER, SFM8 PDF资料下载
参数资料
| 型号： | L9911V |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, SFM8 |
| 封装： | ROHS COMPLIANT, MULTIWATT-8 |
| 文件页数： | 15/19页 |
| 文件大小： | 276K |
| 代理商： | L9911V |
L9911
Circuit operation
Doc ID 10990 Rev 6
5/19
1
Circuit operation
The alternator's voltage regulator performs the following main functions:
1.
voltage regulation
2.
protection
3.
control fault diagnosis
4.
load response control
1.1
Voltage regulation
The alternator voltage is compared with a reference voltage in an amplifier, whose output
determines the switching frequency of output power MOS whose current excites the coil of
the alternator; as the regulator is in fixed-frequency topology, the field switching frequency
does not depend on the alternator characteristics. The regulators have an integrated filter in
the voltage sensing path guaranteeing the correct behavior of the devices also when the
rectifier diodes feature very high switching spikes. The internal filtering allows the usage of
the device also with very long cables connecting the alternator to the battery with an
impedance so high to cause a superimposed ripple on the alternator voltage higher than 5-
6V. Consequently it doesn't need, in the standard application, any external component.
Anyway an external capacitor (2.2F) must be inserted between A+ and ground when using
the device with very long cables.
1.2
Protection
It is present a protection against short circuits of the lamp and the relay power drivers (L)
and of the field power driver (F+), a thermal drivers shutdown protection and an overvoltage
protection of L power drivers.
1.3
Diagnosis
The circuit detects fault conditions related to the phase and F+ status and receives
informations from one of the three alternator phases. In order to prevent spurious
indications, fault warnings are not displayed immediately but are delayed by a fixed time.
1.4
Load response control
The internal circuit regulates the soft start characteristics (activated always at engine start)
and the soft attack characteristics.
相关PDF资料 |
PDF描述 |
|---|---|
| LX1555CDM-TR | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| LSP3122D33AE | 6.9 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PSSO5 |
| LSP3122D50AE | 6.9 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PSSO5 |
| LTC3851AEUD-1#TRPBF | 0.05 A SWITCHING CONTROLLER, 810 kHz SWITCHING FREQ-MAX, PQCC16 |
| LME0512DC | DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L9914A | 功能描述:低压差稳压器 - LDO Car Alternator Reg Multifunction Volt RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| L9914B | 功能描述:低压差稳压器 - LDO Car Alternator Reg Multifunction Volt RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| L9914C | 功能描述:低压差稳压器 - LDO Multi Gen Volt REG 40V 6W 8 to 16V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| L9915 | 制造商:STMicroelectronics 功能描述:AUTOMOTIVE SMART REGULATOR |
| L9915A | 制造商:STMicroelectronics 功能描述:AUTOMOTIVE SMART REGULATOR |
发布紧急采购，3分钟左右您将得到回复。