TDA8931T/N1,112 NXP Semiconductors, TDA8931T/N1,112 Datasheet - Page 5

• Manufacturer Part Number: TDA8931T/N1,112
• Description: IC AMP/COMPARATOR 22W D 20SOIC
• Manufacturer: NXP Semiconductors
• Type: Class Dr

Specifications of TDA8931T/N1,112

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 22W x 1 @ 4 Ohm
• Voltage - Supply: 12 V ~ 35 V, ±6 V ~ 17.5 V
• Features: Depop, Short-Circuit and Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-3609-5; 935276045112; TDA8931T

Philips Semiconductors
8. Functional description
9397 750 13847
Preliminary data sheet
8.1 General
8.2 Interfacing
8.3 Input comparator
8.4 Half supply voltage input reference (pin HVPI)
The TDA8931 is a switching power stage for high efficiency class-D audio power amplifier
systems. It contains a Single-Ended (SE) power stage, drive logic, protection control logic,
a full differential input comparator and a HVP charger to charge the SE capacitor (see
Figure
amplifier system can be built. A second order low-pass filter converts the PWM output
signal into an analog audio signal across the speaker.
The operating modes of the TDA8931 can be controlled by pins POWERUP and ENABLE.
Both pins refer to pin CGND. The device has three modes:
When pin POWERUP = LOW, the power comparator is in Sleep mode, independent of the
signal on pin ENABLE. In Sleep mode the SE capacitor charger will be discharged.
When pin POWERUP = HIGH and pin ENABLE = LOW the device is in Standby mode. In
Standby mode the device is DC biased and the SE capacitor will be charged and the
output is floating.
When both pins POWERUP and ENABLE are HIGH, the device is in Operating mode. A
level at pin POWERUP greater than 11 V can also enter the Operating mode, independent
of the level on pin ENABLE (see
Remark: The switch-on sequence is important. First pin POWERUP = HIGH, then pin
ENABLE = HIGH.
Table 4:
The input comparator has a full differential input and is optimized for low noise and low
offset. This results in maximum flexibility in the application.
When the device is in Standby mode, the external capacitor C6 (see
charged until it reaches the half of the supply voltage. This pin charges capacitor C6
within 0.5 seconds.
Voltage on pin
POWERUP
< 0.8 V
3 V to 7 V
> 11 V
•
•
•
Sleep mode
Standby mode
Operating mode
1). With this amplifier a compact 1
Interfacing
ENABLE
-
< 0.8 V
> 3 V
-
Rev. 01 — 14 January 2004
Table
4).
Mode
Sleep
Standby
Operating
Operating
20 W closed loop self-oscillating digital
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Power comparator 1
Figure
TDA8931
5) will be
5 of 31
20 W