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參數資料
| 型號： | MLX10407 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 5-Channel Gauge Driver with Serial Link |
| 中文描述： | 5通道計驅動器，串行鏈路 |
| 文件頁數： | 5/9頁 |
| 文件大小： | 93K |
| 代理商： | MLX10407 |
MLX902xx Name of Sensor Rev Y.X 22/Aug/98 Page 5
MLX10407 5-Channel Gauge Driver with Serial Link Page 5 Rev 1.1 28/Apr/01
MLX10407
5-Channel Gauge Driver with Serial Link
Operation
1) 360° logometers
Immediately following a reset, the IC checks if there is any short-circuit or open circuit on each
buffer driver output (This test is not performed for outputs 5, 6 and 7). During this test, each buffer
is held in a high impedance state and large value internal resistors (100kOhm ) are sequentially
connected on each pair of buffers (note : actuator coils must be connected on bridges).
Three tests are performed according to the following figure and table.
Conditions
Test for :
Test 1
Test 2
Test 3
S1 closed, S2 open
V1 = VSS
S1 open, S2 closed
V1 = VDD
S1 and S2 closed
V1 = VDD/2
During the tests the pin ERRB (16) is at logic level 0. After completing the tests, ERRB remains
low if one (or more) test failed.
ERRB returns to high impedance if everything is OK.
These tests last approximately 4 ms with an oscillator clock frequency of 8 MHz.
After testing, all buffers are at VSS. The chip then waits for the MCU to send an angle/quadrant
value to output the PWM signals for each buffer. Every logometer coil is connected in a bridge,
so the current Icoil can be either positive or negative.
The total drop-out of a bridge is : V
d
= | V
CC
- V
coil
|
Test for short and open circuits
One Bridge
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