20W Audio Power Amp
HSiN Semiconductor Pte Ltd
HD1875
www.hsin.com.sg
1. Overview
The HD1875 is a 20W mono audio power amplifier with high fidelity characterized by low
harmonic distortion, high output power, few external components and it can safeguard the output against
overloads, thermal runaway, short circuit and so on. Besides these above, with advanced manufacturing
process, the HD1875 can be used for hi-fis, stereo recorders and other audio systems. Its
features
are:
銆€Output
power as high as over 30W
銆€Open
loop gain 90dB (Typ)
銆€Low
THD: f = 1kHz
P
O
= 20W THD = 0.015
f
P
= 70 kHz
Typ
銆€Wide
power bandwidth:
銆€Thermal
shut-down system
銆€High
output current: I
om
= 4A (Typ)
銆€Wide
supply voltage range: V
CC
=16~60V
銆€Built-in
output protection diode
銆€Ripple
rejection (94dB)
銆€FZIP5
銆€Short
circuit protection system
銆€
2. Block Diagram and Pin Description
2.1 Block Diagram銆€銆€銆€銆€