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参数资料
| 型号： | TLE7242-2G |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封装： | GREEN, PLASTIC, DSO-28 |
| 文件页数： | 23/50页 |
| 文件大小： | 1210K |
| 代理商： | TLE7242-2G |
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PG-DSO-28-26
Type
Package
Marking
TLE7242-2G
PG-DSO-28-26
TLE7242-2G
Data Sheet
3
Rev. 1.0, 2008-07-09
4 Channel Fixed Frequency Constant Current Control
IC
TLE7242-2G
1Overview
1.1
Features
Low side constant current control pre-driver integrated circuit
Four independent channels
Output current programmable with 11 bit resolution
– Current range = 0 to 1.2A (typ) with a 0.2
sense resistor
– Resolution = 0.78125 mA/bit (typ) with a 0.2
sense resistor
– +/- 2% full scale error over temperature when autozero is used
Programmable PWM frequency via SPI from approximately
50 Hz to 4 KHz (typ)
Programmable KP and KI coefficients for the PI controller for each
channel
Programmable Transient Mode of operation to reduce settling time when large changes in the current set point
are commanded.
Programmable superimposed dither.
– Dither programmed by setting a dither step size and the number of PWM periods in each dither period
– Programmed via the SPI interface
– The dither for each channel can be enabled and programmed independently
Programmable synchronization of the PWM control signals.
– Phase delay time set via the SPI interface
– Synchronization initiated via signal at the PHASE_SYNC input pin.
– Channels within one device and between multiple devices can be synchronized.
Each channel can be configured to function as a simple on/off predriver or a constant current predriver via SPI
Interface and Control
– 32 Bit SPI (Serial Peripheral Interface) - Slave only
– ENABLE pin to disable all channels or freeze all channels
– Active low RESET_B pin resets internal registers to their default state and disables all channels.
– Open drain FAULT pin can be programmed to transition low when various faults are detected.
– 5.0V and 3.3V logic compatible I/O
Protection
– Over current shutdown - monitored at POSx pin.
– Programmable over current threshold
– Programmable over current delay time
– Programmable over current retry time
– Battery pin (BAT) overvoltage shutdown.
Diagnostics
– Over current
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