參數(shù)資料
型號(hào)： TLE8242
廠商： INFINEON TECHNOLOGIES AG
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQFP64
封裝： GREEN, PLASTIC, LQFP-64
文件頁(yè)數(shù)： 34/77頁(yè)
文件大?。?/td> 1580K
代理商： TLE8242
PG-LQFP-64
Type
Package
Marking
TLE8242
PG-LQFP-64
TLE8242L
Data Sheet
4
Rev. 1.0, 2009-02-25
8 Channel Fixed Frequency Constant Current Control
With Current Profile Detection
TLE8242
1Overview
1.1
Features
Low side constant current control pre-driver integrated circuit
Eight 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
10 Hz to 4 kHz (typ)
Programmable KP and KI coefficients for the PI controller for each
channel
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 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 for constant current control or for direct PWM control via SPI
In Direct PWM mode, a current profile detection function is engaged
– Verifies solenoid armature movement
– Profile characteristics programmed via SPI
– Pass / Fail Status can be read 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
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