TDA8933BTW/N2,118 NXP Semiconductors, TDA8933BTW/N2,118 Datasheet - Page 8

• 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
7.3 Start-up and Under-Voltage Lock-Out (UVLO)
7.4 Enable
7.5 Lamp (re-)ignition
The start and stop voltage levels on the VDC-pin depent on the way the IC is supplied:
In the low voltage configuration, the IC starts up at V
oscillating) when the voltage on the VDC-pin drops below V
In the high voltage configuration, the IC starts up at V
oscillating) when the voltage on the VDC-pin drops below V
The UBA2074 is put in standby when the voltage on the EN-pin comes below V
Table
However, in low voltage configuration, the internal linear regulator between VDC and VDD
will remain active, but with reduced current supply capability. All internal signals are reset
when the EN-pin is low.
When the voltage on the EN-pin comes above V
The IC starts at its maximum switching frequency F
CIFB-pin and CSWP-pin are charged (setting the phase shift between the two bridge
halves to maximum). Then the frequency is swept down to the minimum frequency F
(see
as the frequency comes closer to the resonant frequency of the unloaded resonance
circuit. Once the ignition voltage V
will drop to the voltage of the loaded resonance curve.
Fig 6. Initial ignition of flourescent lamp via frequency sweep and load resonance .
Figure
5). The IC will stop oscillating, and most of the internal circuits will shut down.
7). During this initial ignition frequency sweep the lamp voltage will increase
Rev. 02.0 — February 2007
High Voltage Full-bridge control IC for CCFL backlighting
ign
is reached, the lamps will ignite and the lamp voltage
EN(high)
s(max)
VDC(start-low)
VDC(start-high)
the IC will start up again.
. First the capacitors at the
DC(stop-low)
VDC(stop-high)
UBA2074(A)
and locks out (stops
and locks out (stops
.
© NXP B.V. 2007. All rights reserved.
.
EN(low)
8 of 33
s(min)
(see