STK4172II
Sample Application Circuit (II) (protection circuit and muting circuit)
Thermal Design
The IC power dissipation of the STK4172II at the IC-operated mode is 55W max. at load resistance 8Ω and 91W max. at
load resistance 4Ω (simultaneous drive of 2 channels) for continuous sine wave as shown in Figure 1 and 2.
Output power, Po - W
Figure 1. STK4172II Pd – Po (RL = 8Ω)
Output power, Po - W
Figure 2. STK4172II Pd – Po (RL = 4Ω)
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