TDF8590TH 데이터 시트보기 (PDF) - NXP Semiconductors.
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TDF8590TH Datasheet PDF : 30 Pages
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NXP Semiconductors
TDF8590TH
2 × 80 W SE (4 Ω) or 1 × 160 W BTL (8 Ω) class-D amplifier
≈ VSSA + 8 V
Ch1 mean
5.03 V
≈ VSSA + 2 V
VSSA
M 20.0 ms A Ch1 ~ 1.28 V
τ
001aad838
Fig 5. Pin DIAG with activated current limiting
input voltage 2
current in the short 3
(between the speaker
terminals, 5 A/div)
PWM output 1
pin DIAG 4
Ch1 50.0 V∼
Ch3 5.00 VΩ
50 ms
Ch2 500 mV M 25.0 ms Ch3 1.80 V
Ch4 10.0 V
50 ms
50 ms
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Fig 6. Restart of the TDF8590TH
When the loudspeaker terminals are short-circuited and the OCP is triggered the
TDF8590TH is switched off completely and will try to restart every 100 ms (see Figure 6):
• 50 ms after switch off pin DIAG will be released
• 100 ms after switch off the amplifier will return to mute
• 150 ms after switch off the amplifier will return to operation. If the short-circuit
condition is still present after this time this cycle will be repeated. The average
dissipation will be low because of the small duty cycle
A short of the loudspeaker terminals to one of the supply lines will also trigger the
activation of the OCP and the amplifier will shut down. During restart the window
protection will be activated. As a result the amplifier will not start up after 100 ms and pin
DIAG will remain LOW until the short to the supply lines is removed.
TDF8590TH_2
Product data sheet
Rev. 02 — 23 April 2007
© NXP B.V. 2007. All rights reserved.
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