CS4412A-CNZ Cirrus Logic Inc, CS4412A-CNZ Datasheet - Page 19

• Manufacturer Part Number: CS4412A-CNZ
• Description: IC AMP AUDIO PWR 30W QUAD 48QFN
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r
• Type: Class Dr

Specifications of CS4412A-CNZ

• Output Type: 2-Channel (Stereo) or 4-Channel (Quad)
• Package / Case: 48-QFN
• Max Output Power X Channels @ Load: 30W x 1 @ 4 Ohm; 15W x 2 @ 8 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: Depop, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Product: Class-D
• Output Power: 30 W
• Thd Plus Noise: 10 %
• Operating Supply Voltage: 2.5 V to 5 V
• Supply Current: 20 mA
• Maximum Power Dissipation: 66 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio - Load Impedance: 4 Ohms, 6 Ohms, 8 Ohms
• Audio Load Resistance: 8 Ohms, 4 Ohms
• Minimum Operating Temperature: - 20 C
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.375 V
• Amplifier Class: D
• No. Of Channels: 4
• Supply Voltage Range: 8V To 18V
• Load Impedance: 4ohm
• Operating Temperature Range: -10°C To +70°C
• Amplifier Case Style: QFN
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1581 - REFERENCE DESIGN FOR CS4412A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1653

DS786A2
4.5
4.5.1
4.5.2
Device Protection and Error Reporting
The CS4412A has built-in protection circuitry for over-current, under-voltage, and thermal warning/over-
load conditions. The levels of the over-current error, thermal error, and VP under-voltage trigger points
are listed in the
ever any of these preset thresholds, other than thermal warning, are crossed.
Each error and warning pin implements an active-low open-drain driver and requires an external 22 kΩ
pull-up resistor for proper operation.
Over-Current Protection
An over-current error condition occurs if the peak output current exceeds the Over-Current Error trigger
point. Over-current errors for OUT1/2 and OUT3/4 are reported on the ERROC12 and ERROC34 pins,
respectively. The power output of the channel that is reporting the over-current condition will be set to
high-impedance until the error condition has been removed and the reset signal for that channel has been
toggled from low to high.
Thermal Warning, Thermal Error, and Under-Voltage Error
Table 8
junction thermal warning trigger point, the TWR pin is set low. If the junction temperature continues to in-
crease beyond the junction thermal error trigger point, the ERRUVTE pin will be set low. If the voltage on
VP falls below the VP under-voltage error trigger point, ERRUVTE will be set low.
When the thermal error or VP under-voltage trigger point is crossed, all power outputs will be set in a high-
impedance state until the error condition has been removed and both the RST12 and RST34 signals have
been toggled from low to high.
shows the behavior of the TWR and ERRUVTE pins. When the junction temperature exceeds the
TWR
0
0
1
1
PWM Power Output Characteristics
ERROCxy
ERRUVTE
0
1
0
1
0
1
Table 8. Thermal and Under-Voltage Error Conditions
Thermal warning and thermal error and/or under-voltage error
Thermal warning only
Under-voltage error
Junction temperature and VP voltage within normal limits
Table 7. Over-Current Error Conditions
Over-current error on channel x or channel y
Operating current of channel x and y within allowable limits
Reported Condition
table on
Reported Condition
page
6. Automatic shut-down occurs when-
CS4412A
19