Document
ESMT
Features
z Single supply voltage 8 ~ 26V for loudspeaker driver Built-in LDO output 3.3V for others z Loudspeaker power from 24V supply BTL Mode: 20W/CH into 8Ω @0.09% THD+N PBTL Mode: 40W/CH into 4Ω @0.15% THD+N z Loudspeaker power from 13V supply BTL Mode: 10W/CH into 8Ω @10% THD+N z 87% efficient Class-D operation eliminates need for heat sink z Differential inputs z Four selectable, fixed gain settings z Internal oscillator z Short-Circuit protection with auto recovery option z Under-Voltage detection z Over-Voltage protection z Pop noise and click noise reduction z Adjustable power limit function for speaker protection z Output DC detection for speaker protection z Filter-Free operation z Over temperature protection with auto recovery z Dynamic temperature control prevents chip from over heating z Boom-Box z Powered speaker z Consumer Audio Equipment
AD52580
20W Stereo Class-D Audio Amplifier with Power Limit And Dynamic Temperature Control
Description
The AD52580 is a high efficiency stereo class-D audio amplifier with adjustable power limit function and dynamic temperature control. The loudspeaker driver operates from 8~26V supply voltage and analog circuit operates at 3.3V supply voltage. It can deliver 20W/CH output power into 8Ω loudspeaker within 0.09% THD+N and without external heat sink when playing music. AD52580 provides parallel BTL (Mono) application, and it can deliver 40W into 4Ω loudspeaker within 0.15% THD+N. The adjustable power limit function allows user to set a voltage rail lower than half of 3.3V to limit the amount of current through the speaker. Output DC detection prevents speaker damage from long-time current stress. The dynamic temperature control is a gain control system. As chip junction temperature higher than a warning level, the gain level will decrease until junction temperature lower than the warning level. The output short circuit and over temperature protection include auto-recovery feature.
Applications
z TV audio
Simplified Application Circuit
Elite Semiconductor Memory Technology Inc.
Publication Date: Sep. 2013 Revision: 1.2 1/23
ESMT
Pin Assignments
AD52580
Pin Description
NAME E-TSSOP -28L 1 E-TSSOP -24L 1 TYP I DESCRIPTION Shutdown signal for IC (Low = disabled, output Hi-Z; High = operational). Voltage compliance to 26V. Open drain output used to display short circuit or dc detect fault. Voltage
SD
FAULT
2
2
O
compliant to 26V. Short circuit faults can be set to auto-recovery by connecting FAULTB pin to SD pin. Otherwise, both short circuit faults and dc detect faults must be reset by cycling PVCC.
LINP LINN GAIN0 GAIN1 NC AGND AVDD
3 4 5 6 7 8 9
3 4 5 6 7 8 9
I I I I
Positive audio input for left channel. Biased at 1.65V. Negative audio input for left channel. Biased at 1.65V. Gain select least significant bit. Voltage compliance to 26V. Gain select most significant bit. Voltage compliance to 26V. Not connected.
P O
Analog signal ground. Connect to the thermal pad. 3.3V regulated output. Power limit level adjustment. Connect a resistor divider from AVDD to GND to
PLIMIT
10
10
I
set power limit. Give V(PLIMIT) < 1.55V GND for no power limit.
to set power limit level. Connect to
RINN RINP NC PBTL
11 12 13 14
11 12 NA NA
I I
Negative audio input for right channel. Biased at 1.65V. Positive audio input for right channel. Biased at 1.65V. Not connected.
I
Parallel BTL mode switch, high for parallel BTL output. Voltage compliance to 26V.
Elite Semiconductor Memory Technology Inc.
Publication Date: Sep. 2013 Revision: 1.2 2/23
ESMT
PVCCR NC OUTPR PGND OUTNR NC NC OUTNL PGND OUTPL NC PVCCL 15,16 17 18 19 20 21 22 23 24 25 26 27,28 Thermal Pad 13 14 15 16 17 18 19 20 21 22 23 24 P P O P O O P O P power supply inputs are connect internal. Not connected. Class-D H-bridge positive output for right channel. Power ground for the H-bridges. Class-D H-bridge negative output for right channel. Not connected. Not connected. Class-D H-bridge negative output for left channel. Power ground for the H-bridges. Class-D H-bridge positive output for left channel. Not connected.
AD52580
High-voltage power supply for right-channel. Right channel and left channel
High-voltage power supply for right-channel. Right channel and left channel power supply inputs are connect internal. Must be soldered to PCB’s ground plane.
Ordering Information
Product ID AD52580-QG24NAT Package E-TSSOP 24L Packing 62 Units / Tube 100 Tubes / Small Box 50 Units / Tube 100 Tubes / Small Box 2500 Units / Reel 5000 Units / Small Box Comments Green
AD52580-QG28NAT
E-TSSOP 28L
Green
AD52580-QG28NAR
E-TSSOP 28L
Green
Available Package
Package Type E-TSSOP 24L AD52580 E-TSSOP 28L 28 Device No. θJA(o C/W) 32.8 6.0 1.33 Yes (Note 1) θjc(℃/W) Ψjt(℃/W) Exposed Thermal Pad
Note 1.1: The thermal pad is located at the bottom of the package. To optimize thermal performance, soldering the thermal pad to the PCB’s ground plane is necessary. Note 1.2: θja is measured on a r.