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Hi team
The customer had a problem of LP5024 that Pin 20-24 can't work normally, there is not output curve of Pin19(OUT18) and Pin18(OUT17) can output PWM normally. The schematic and register configuration are shown as below.
I reviewed the schematic finding they use Pin19,20,21 to drive a NPN transistor to adjust LED. I think LP5024 is sink current type, so is it ok that using it to drive a NPN transistor?
And pls help to check the schematic and register configuration to see if there is any error in use that causes abnormal output.
Looking forward your reply, thanks!
|
Register |
Default |
Value |
HEX |
|
0x00 |
00h |
0x40 |
0100 0000 |
|
0x01 |
3ch |
0x1e |
0001 1110 |
|
0x02 |
00h |
0x00 |
0000 0000 |
|
0x03 |
FFh |
0xff |
1111 1111 |
|
0x04 |
00h |
0x00 |
0000 0000 |
|
0x05 |
00h |
0x00 |
0000 0000 |
|
0x06 |
00h |
0x00 |
0000 0000 |
|
0x07 |
FFh |
0xff |
1111 1111 |
|
0x08 |
FFh |
0xff |
1111 1111 |
|
0x09 |
FFh |
0xff |
1111 1111 |
|
0x0A |
FFh |
0xff |
1111 1111 |
|
0x0B |
FFh |
0xff |
1111 1111 |
|
0x0C |
FFh |
0xff |
1111 1111 |
|
0x0D |
FFh |
0xff |
1111 1111 |
|
0x0E |
FFh |
0xff |
1111 1111 |
|
0x0F |
00h |
0xff |
1111 1111 |
|
0x10 |
00h |
0xff |
1111 1111 |
|
0x11 |
00h |
0xff |
1111 1111 |
|
0x12 |
00h |
0xff |
1111 1111 |
|
0x13 |
00h |
0xff |
1111 1111 |
|
0x14 |
00h |
0xff |
1111 1111 |
|
0x15 |
00h |
0xff |
1111 1111 |
|
0x16 |
00h |
0xff |
1111 1111 |
|
0x17 |
00h |
0xff |
1111 1111 |
|
0x18 |
00h |
0xff |
1111 1111 |
|
0x19 |
00h |
0xff |
1111 1111 |
|
0x1A |
00h |
0xff |
1111 1111 |
|
0x1B |
00h |
0xff |
1111 1111 |
|
0x1C |
00h |
0xff |
1111 1111 |
|
0x1D |
00h |
0xff |
1111 1111 |
|
0x1E |
00h |
0xff |
1111 1111 |
|
0x1F |
00h |
0xff |
1111 1111 |
|
0x20 |
00h |
0xff |
1111 1111 |
|
0x21 |
00h |
0xff |
1111 1111 |
|
0x22 |
00h |
0xff |
1111 1111 |
|
0x23 |
00h |
0xff |
1111 1111 |
|
0x24 |
00h |
0xff |
1111 1111 |
|
0x25 |
00h |
0xff |
1111 1111 |
|
0x26 |
00h |
0xff |
1111 1111 |
|
0x27 |
00h |
0x00 |
0000 0000 |
