TDA8933BTW/N2,118 NXP Semiconductors, TDA8933BTW/N2,118 Datasheet - Page 10

• Manufacturer Part Number: TDA8933BTW/N2,118
• Description: IC AMP AUDIO CLASS D 32HTSSOP
• Manufacturer: NXP Semiconductors
• Type: Class Dr

Specifications of TDA8933BTW/N2,118

• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 20.6W x 1 @ 16 Ohm; 10.3W x 2 @ 8 Ohm
• Voltage - Supply: 10 V ~ 36 V, ±5 V ~ 18 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 32-TSSOP Exposed Pad, 32-eTSSOP, 32-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935285222118

NXP Semiconductors
UBA2074(A)
Preliminary data sheet
7.6 Lamp current control
The lamp current control is active during the initial ignition frequency sweep and when the
lamps are on. It is disabled during the time within a PWM dim cycle that the lamps are off.
An (AC or DC) voltage representing the lamp current, usually the voltage across an
external sense resistor, is to be connected to the IFB-pin. This voltage is internally
double-side rectified (DSR), and compared to a reference level V
transconductance amplifier (OTA), as shown in
When the current is being regulated, switches S1 and S2 (see
(conducting). The output current of the OTA is fed into capacitor C1, which is connected to
the CIFB-pin. The voltage across this capacitor is copied into capacitor C2, which is
connected to the CSWP-pin. The voltage on the CSWP-pin controls the phase shift.
Fig 8. frequency and phase shift as function of CVFB and CSWP voltages
Fig 9. Lamp current control circuit
Rev. 02.0 — February 2007
High Voltage Full-bridge control IC for CCFL backlighting
Figure
9.
Figure
UBA2074(A)
IFB(reg)
9) are closed
© NXP B.V. 2007. All rights reserved.
by an operational
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