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power comparator. TDA8939 Datasheet

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power comparator. TDA8939 Datasheet
















TDA8939 comparator. Datasheet pdf. Equivalent













Part

TDA8939

Description

Zero dead time Class-D 7.5 A power comparator



Feature


TDA8939 Zero dead time Class-D 7.5 A pow er comparator Rev. 01 — 22 April 2004 Objective data sheet 1. General descr iption Zero dead time Class-D 7.5 A pow er comparator The TDA8939 is a power co mparator designed for use in a high ef ciency class-D audio power amplifier system. It contains power switches, dr ive logic, protection circuitry, bias c ircuitry and a fully dif.
Manufacture

NXP

Datasheet
Download TDA8939 Datasheet


NXP TDA8939

TDA8939; ferential input stage (comparator). This device is optimized for applications i n fully digital open-loop class-D audio systems (in combination with a digital PWM controller). The TDA8939 power com parator operates with high efficiency and low dissipation. The system operate s over a wide supply voltage range from ±10 V up to ±30 V. 2. Features s s s s s s s s s Zero dea.


NXP TDA8939

d time switching Maximum output current 7.5 A Standby mode High efficiency Ope rating voltage from ±10 V to ±30 V (s ymmetrical) or 20 V to 60 V (asymmetric al) Low quiescent current High output p ower Diagnostic output Thermal protecti on, current protection and voltage prot ection. 3. Applications s s s s s Tele vision sets Home-sound sets Multimedia systems All mains fed .


NXP TDA8939

audio systems Car audio (boosters). Phi lips Semiconductors TDA8939 Zero dead time Class-D 7.5 A power comparator 4. Quick reference data Table 1: Quick re ference data VP = ±25 V; fcarrier = 38 4 kHz. Symbol VP Parameter supply volta ge Conditions symmetrical supply voltag e asymmetrical supply voltage Iq(tot) t otal quiescent current no load connecte d; no filters; no sn.




Part

TDA8939

Description

Zero dead time Class-D 7.5 A power comparator



Feature


TDA8939 Zero dead time Class-D 7.5 A pow er comparator Rev. 01 — 22 April 2004 Objective data sheet 1. General descr iption Zero dead time Class-D 7.5 A pow er comparator The TDA8939 is a power co mparator designed for use in a high ef ciency class-D audio power amplifier system. It contains power switches, dr ive logic, protection circuitry, bias c ircuitry and a fully dif.
Manufacture

NXP

Datasheet
Download TDA8939 Datasheet




 TDA8939
TDA8939
Zero dead time Class-D 7.5 A power comparator
Rev. 01 — 22 April 2004
Objective data sheet
1. General description
Zero dead time Class-D 7.5 A power comparator
The TDA8939 is a power comparator designed for use in a high efficiency class-D audio
power amplifier system.
It contains power switches, drive logic, protection circuitry, bias circuitry and a fully
differential input stage (comparator).
This device is optimized for applications in fully digital open-loop class-D audio systems
(in combination with a digital PWM controller).
The TDA8939 power comparator operates with high efficiency and low dissipation. The
system operates over a wide supply voltage range from ±10 V up to ±30 V.
2. Features
s Zero dead time switching
s Maximum output current 7.5 A
s Standby mode
s High efficiency
s Operating voltage from ±10 V to ±30 V (symmetrical) or 20 V to 60 V (asymmetrical)
s Low quiescent current
s High output power
s Diagnostic output
s Thermal protection, current protection and voltage protection.
3. Applications
s Television sets
s Home-sound sets
s Multimedia systems
s All mains fed audio systems
s Car audio (boosters).




 TDA8939
Philips Semiconductors
TDA8939
Zero dead time Class-D 7.5 A power comparator
4. Quick reference data
Table 1: Quick reference data
VP = ±25 V; fcarrier = 384 kHz.
Symbol
Parameter
VP supply voltage
Conditions
symmetrical supply
voltage
Min Typ Max Unit
[1] ±10 ±25 ±30 V
asymmetrical supply
voltage
20 50 60 V
Iq(tot)
η
total quiescent current no load connected; no
filters; no snubbers
connected
efficiency
Prated
- 50 70 mA
- 90 - %
[1] When the supply voltage is below ±12.5 V the PWM outputs will not be able to switch to the high side at the
first PWM cycle.
5. Ordering information
Table 2: Ordering information
Type
number
Package
Name Description
TDA8939TH HSOP24 plastic, heatsink small outline package; 24 leads; low
stand-off height
Version
SOT566-3
9397 750 13023
Objective data sheet
Rev. 01 — 22 April 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
2 of 21




 TDA8939
Philips Semiconductors
6. Block diagram
TDA8939
Zero dead time Class-D 7.5 A power comparator
VDDA1
IN1P
IN1N
VSSA1
3
4
2
1
5
POWERUP
TDA8939TH
7
DIAGN
Q PROTECTION S
LATCH
R
ENABLE
CGND
6
8
VDDA2
IN2P
IN2N
VSSA2
10
9
11
12
24 sub
VSSD
heatsink
Fig 1. Block diagram.
ZERO
DEAD TIME
CONTROL
DRIVER
HIGH
DRIVER
LOW
22
BOOT1
23
VDDP1
21
OUT1
STAB
12 V
19
20
OTP temperature sensor
OCP current protection
OVP overvoltage protection
UVP undervoltage protection
15
14
ZERO
DEAD TIME
CONTROL
DRIVER
HIGH
DRIVER
LOW
16
STAB1
VSSP1
BOOT2
VDDP2
OUT2
STAB
12 V
13
n.c.
18
STAB2
17
VSSP2
001aaa624
9397 750 13023
Objective data sheet
Rev. 01 — 22 April 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
3 of 21




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