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CS4525 bảng dữ liệu(PDF) 45 Page - Cirrus Logic

tên linh kiện CS4525
Giải thích chi tiết về linh kiện  30 W Digital TV Amplifier with Integrated ADC
PDF  91 Pages
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nhà sản xuất  CIRRUS [Cirrus Logic]
Trang chủ  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS4525 bảng dữ liệu(HTML) 45 Page - Cirrus Logic

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DS726A1
45
CS4525
6.1.7.3
PWM PopGuard Transient Control
The CS4525 uses PopGuard technology to minimize the effects of power-up and power-down output tran-
sients commonly produced by half-bridge, single supply amplifiers implemented with external DC-block-
ing capacitors connected in series with the audio outputs.
PWM PopGuard operates by linearly ramping the PWM power outputs up to and down from their bias
point of VP/2 when a channel is powered up and down respectively using the PDnOutX or PDnAll bits.
This gradual voltage ramp minimizes output transients while the DC blocking capacitor is charged and
discharged.
The PWM PopGuard output ramp time can be varied from approximately 0.70 seconds to approximately
0.85 seconds and can be completely disabled via the RmpSpeed[1:0] bits in the Foldback Cfg register.
All output channels are affected by the RmpSpeed[1:0] bits, and PWM PopGuard is disabled by default.
Referenced Control
Register Location
RmpSpeed[1:0] ................... “Ramp Speed (RmpSpd[1:0])” on page 70
PDnAll ................................. “Power Down (PDnAll)” on page 81
PDnOutX ............................. “Power Down PWM Power Output X (PDnOutX)” on page 81



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