Denon HEOS AVR Service Manual page 38

TPA3251 (D-AMP : IC601, IC602, IC603)
Pin Function
NAME NO. I/O(1) DESCRIPTION
AVDD 14 P Internal voltage regulator, analog section
BST_A 44 P HS bootstrap supply (BST), external 0.033 µF capacitor to OUT_A required.
BST_B 43 P HS bootstrap supply (BST), external 0.033 µF capacitor to OUT_B required.
BST_C 24 P HS bootstrap supply (BST), external 0.033 µF capacitor to OUT_C required.
BST_D 23 P HS bootstrap supply (BST), external 0.033 µF capacitor to OUT_D required.
CLIP_OTW 21 O Clipping warning and Over-temperature warning; open drain; active low
C_START 15 O Startup ramp, requires a charging capacitor to GND
DVDD 11 P Internal voltage regulator, digital section
FAULT 19 O Shutdown signal, open drain; active low
FREQ_ADJ 8 O Oscillator freqency programming pin
GND 12, 13, 25, 26, 33, 34, 41, 42 P Ground
GVDD_AB 1 P Gate-drive voltage supply; AB-side, requires 0.1 μ F capacitor to GND
GVDD_CD 22 P Gate-drive voltage supply; CD-side, requires 0.1 μ F capacitor to GND
INPUT_A 5 I Input signal for half bridge A
INPUT_B 6 I Input signal for half bridge B
INPUT_C 16 I Input signal for half bridge C
INPUT_D 17 I Input signal for half bridge D
M1 3 I Mode selection 1 (LSB)
M2 4 I Mode selection 2 (MSB)
OC_ADJ 7 I/O Over-Current threshold programming pin
OSC_IOM 9 I/O Oscillator synchronization interface
OSC_IOP 10 O Oscillator synchronization interface
OUT_A 39, 40 O Output, half bridge A
OUT_B 35 O Output, half bridge B
OUT_C 32 O Output, half bridge C
OUT_D 27, 28 O Output, half bridge D
PVDD_AB 36, 37, 38 P PVDD supply for half-bridge A and B
PVDD_CD 29, 30, 31 P PVDD supply for half-bridge C and D
RESET 18 I Device reset Input; active low
Power supply for internal voltage regulator requires a 10- μ F capacitor with a 0.1- μ F
VDD 2 P
capacitor to GND for decoupling.
VBG 20 P Internal voltage reference requires a 0.1- μ F capacitor to GND for decoupling.
PowerPad™ P Ground, connect to grounded heat sink
(1) I=Input, O=Output, I/O= Input/Output, P=Power
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