Harman Kardon DPR 2005, Service Manual

Page: 38 / 127

CONSUMER
5
GR70 Data Sheet Aug 26, 2003 v1.82
3.3 PERFORMANCE CHARACTERISTICS
Resistance load = 8
Ω
, HV=38V, LV=12V, SV=7.5V
3.4 DC POWER REQUIREMENTS
T
A
= 25°C, HV=38V, LV=12V, SV=7.5V, Ground = 0V
Specification Condition Min Typ Max Unit
Output Power All channels driven, FTC
3
70 70 W
Frequency Response 20 Hz to 24 kHz, at 1W output power -0.5 0.5 dB
Dynamic Range -60 dB input @ 1kHz -96 dB
Output Distortion (THD+N)
20 Hz to 24 kHz, at 1W output power,
MPC control bit off
0.12 0.15 %
Note 3: FTC spec: 30 minute pre-soak at 1/8th power, full power for 5 minutes, all channels driven simultaneously.
TABLE 4: Performance Characteristics
Symbol Description Condition Min Typ Max Unit
HV
4
High Voltage Supply 38 V
+12VDC +12V Supply 11.75 12 12.5 V
+7.5VDC +7.5V Supply 7.0 7.5 TBD V
T
srHV
High Voltage Supply Slew
Rate
See Chapter 5.8 20 V/S
HV High Voltage Supply
All channels at full power output
18 TBD A
+12VDC +12V Supply TBD 1.0 A
+7.5VDC +7.5V Supply TBD 0.85 A
HV High Voltage Supply
/PWRDWN asserted
TBD TBD A
+12VDC +12V Supply TBD 1.0 A
+7.5VDC +7.5V Supply TBD 0.85 A
Note 4: The peak current requirement for the HV power supply is dependent on the overall system power output specification.
The GR70 is designed to meet FTC power amplifier specifications for a sine wave continuous power measurement with all chan-
nels driven. Under normal conditions for most applications, all channels may not need to be driven at full power simultaneously.
More typically, the power output requirement is 1/8 to 1/3 of the total amplifier output. However, if the amplifier is allowed to
be driven into high distortion (“clipping”), the power supply current may approach 20% more than required for a full scale out-
put. It is therefore up to the system designer to determine how much power output the module will be allowed to produce, and
hence determine the maximum and average power supply current requirements.
TABLE 5: DC Power Requirements
Speaker
Outputs
1-7
Controller
Pwr FET 7
Pwr FET 2
Pwr FET 1
Filter 7
Filter 2
Filter 1
GR Module
Driver 7
Driver 2
Driver 1
Digital Audio
Out HV Supply
ADC
2-Wire Serial Control
/RESET
Zone Control
/PWRDWN
Zone 2 Analog
Primary Digital Audio
Zone 2 Digital Audio
Output Protection
+12V Supply
+7.5V Supply /ERROR
D
PR1005/DPR2005 harman/kardon
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