DB3 Diagnostic Byte:
Bit
D7 Stand-by status (= IB2 − D4)
D6 Diagnostic status (= IB1 − D6)
D5 Channel 3 current detection
Output peak current < 250 mA (IB2 − D7 = 0) − open load (D5 = 1)
Output peak current < 100 mA (IB2 − D7 = 1) − open load (D5 = 1)
Output peak current > 500 mA (IB2 − D7 = 0) − normal load (D5 = 0)
Output peak current > 300 mA (IB2 − D7 = 1) − normal load (D5 = 0)
D4 Channel 3
Turn-on diagnostic (D4 = 0)
Permanent diagnostic (D4 = 1)
D3 Channel 3
Normal load (D3 = 0)
Short load (D3 = 1)
D2 Channel 3
Turn-on diag: No open load (D2 = 0)
Open load detected (D2 = 1)
Offset diag: No output offset (D2 = 0)
Output offset detected (D2 = 1)
D1 Channel 3
No short to VCC (D1 = 0)
Short to VCC (D1 = 1)
D0 Channel 3
No short to GND (D0 = 0)
Short to GND (D0 = 1)
TB2932HQ
19
2009-02-02