Hypex Electronics BV
Kattegat 8
9723 JP Groningen, The Netherlands
+31 50 526 4993
sales@hypex.nl
High Efficiency Power Amplifier Module (OEM version)
Highlights
Flat, fully load-independent frequency
response
Low output impedance
Very low, frequency-independent THD
Very low noise
Fully passive loop control
Consistent top performer in listening trials
Features
Runs on unregulated +/- rails
Pop-free start and stop control
Differential audio input
Overcurrent and overvoltage protection
Weight: 250gms
Applications
Monitor loudspeakers for recording and
mastering studios
Audiophile power amplifiers for
professional and consumer use
Public Address systems
Home theatre systems
Active loudspeakers
Description
The UcD700™ (OEM version) amplifier module is a self-contained high-performance class D amplifier
intended for a wide range of audio applications, ranging from Public Address systems to ultrahighfidelity replay systems for studio and home use. Chief distinguishing features are flat frequency
response irrespective of load impedance, nearly frequency-independent distortion behaviour and
very low radiated and conducted EMI. Control is based on a phase-shift controlled self-oscillating
loop taking feedback only at the speaker output.
OEM Version
Performance data
Power supply = +/-85V, Load=4Ù, MBW=40kHz, unless otherwise noted
Item
Symbol
Min
Typ
Max
Unit Notes
Output Power
700
W
THD=1%
PR
Distortion
THD+N
0.02
%
20Hz<f<20kHz, Pout<PR/2
0.005
%
20Hz<f<20kHz, Pout=1W
1m
V
DC offset
VDC
30µ
35µ
V
Unwtd, 20Hz-20kHz
Output noise
UN
Ω
Output Impedance
20m
f<1kHz
ZOUT
Ω
150m
f<20kHz
Power Bandwidth
PBW
20-35k
Hz
Frequency Response
10
50k
Hz
+0/-3dB. All loads
Voltage Gain
25.5 26
26.5
dB
AV,tot
Voltage Gain
12.5 13
13.5
dB
Input buffer bypassed
AV,tot
Required input level for
2.65
V
Appropriate supply voltage
700W/4Ω/THD=1%
level assumed
Ripple Rejection
PSRR
65
dB
Either rail, all frequencies
η
Efficiency
92
%
Full power
Idle Losses
P0
15
W
+/- 90V rails
Standby Current
10m
A
ISTBY
Current Limit
28
A
Hiccup mode after 40 ms
IOUT,P
Audio Input Characteristics
Item
Input Impedance
Input Imp. (buffer bypassed)
Common Mode Rejection Ratio
Symbol
ZIN
ZIN
CMRR
Min
Typ
100k
1.8k
75
Max
Unit
Ω
Ω
dB
Notes
Either input to ground
Either input to ground
All frequencies
Absolute maximum ratings
Correct operation at these limits is not guaranteed. Operation beyond these limits may
result in irreversible damage
Item
Symbol Rating Unit Notes
Power supply voltage
Unit shuts down when either rail exceeds 96V
+/-100 V
VB
Driver supply voltage
+15
V
Referred to -VB. Vdr current is 200mA Max.
VDR
+/-12
V
Either input referred to ground
Audio Input voltage
VIN
Aux. supply voltage
+/-15
V
VAUX
Peak output current
A
Unit current-limits at 28 A
IOUT,P
Air Temperature
65
°C
TAMB
Heat-sink temperature TSINK
90
°C
insure this condition under most adverse use
Recommended Operating Conditions
Item
Power supply voltage
Driver supply voltage
Load impedance
Source impedance
Effective power supply
storage Capacitance
R5
Symbol
VB
VDR
ZLOAD
ZSRC
CSUP
Min
75
Typ
90
15
Max
95
1
7k
10.000 µ
Unit
V
V
Ω
Ω
F
Notes
Per rail, per attached
amplifier. 4Ω load.
2
OEM Version
Connections
J8/J10: Auxiliary connection.
®
®
J8 Connector type: 4-pin MOLEX KK series.
J10 Connector type: Standard 2.54mm boxheader.
Pin (J8)
(Pin J10)
Type
Function
1
4
Input
Non inverting Audio Input
2
2, 8
Input
GND
3
3
Input
Inverting Audio Input
4
5
Input
Amplifier enable
NA
1
Output
DC error (open collector)
NA
6
Output
Clipping output (open collector)
NA
7
Output
Amplifier Ready
1)
NA
9
Input
Auxiliary power supply -12V
1)
NA
10
Input
Auxiliary power supply +12V
1) This auxiliary supply only supplies the on-board buffer opamp and can be omitted when this
opamp is bypassed.
J11: power supply connection.
Connector type: JST-B4P-VH
Pin
1, Vcc
2, GND
3, Vee
4, Vdr
Type
Input
Input
Input
Input
Function
Positive power supply connection
Power supply ground connection
Negative power supply connection
Driver supply connection, VDR (referred to Vee)
J12: Loudspeaker output.
Connector type: JST-B4P-VH
Pin
1,3, LS2,4, LS+
Type
Output
Output
Function
Output (cold)
Output (hot)
Fig1. Connector pinning UcD700™ (OEM version).
R5
3
OEM Version
Clipping Detection Characteristics
The UcD700™ (OEM version) has an integrated output clipping detection which will pull pin J10:6 low
in case of such an event.
Item
Min
Typ
Max
Unit
Notes
Voltage on pin J10:6, clipping
1
V
Internal open collector*
* Must be pulled to a positive voltage by means of an external resistor. Open collector maximum
output current: 100mA. Maximum collector voltage: 65V.
Fig2.
Clipping Detection Output
interface.
DC-Error Detection Characteristics
The UcD700™ (OEM version) has an integrated DC-error detection which will pull pin J10:1 low in
case of such an event. It is recommended to sense this fault condition and to interrupt both power
supply lines in such an event.
Item
Min
Typ
Max
Unit
Notes
Voltage on pin J10:1, DC-error
1
V
Internal open collector*
* Must be pulled to a positive voltage by means of an external resistor. Open collector maximum
output current: 100mA. Maximum collector voltage: 150V.
Fig3.
R5
DC-Error Output interface.
4
OEM Version
Amplifier ON/OFF Characteristics
The UcD700™ (OEM version) is enabled by pulling pin J10:5 (or J8:4) low. Leaving this pins floating
will put the amplifier in standby.
Item
Min
Typ
Max
Unit
Notes
Voltage on pin J10:5/J8:4, left floating
6,5
V
Internally pulled up*
* Must be pulled low by means of an open collector.
Fig4.
Amplifier On/Off Control interface.
Amplifier Ready Characteristics
The UcD700™ (OEM version) has an integrated Amplifier Ready condition which will pull pin J10:7
high to indicate that the amplifier shut itself down due to an error. This error can be either an
overvoltage event or a shorted output.
Item
Min
Typ
Max
Unit
Notes
Voltage on pin J10:7, error
5,6
V
Internally pulled up
Fig5.
R5
Amplifier Ready Output interface.
5
OEM Version
Signal path characteristics
The UcD700™ (OEM version) enables the user to choose between two different ways of
input signal routing. Standard jumper settings are set to use the on-board buffer opamp
(NE5532). In order to bypass the on-board buffer and AC-coupling capacitors all four
jumpers (J1, J2, J4, J5) need to be set according to picture.
Note: Since the amplifier is now fully DC-coupled the user must ensure that the input
signal is completely free of DC components.
Fig6. Audio Input Buffer interface.
Amplifier start-up delay
During initial power up the amplifier is disabled for approx. 1.5s regardless of the state of the
Amplifier Enable pin. Once powered up there is no start or stop delay. The Amplifier Ready pin
remains high during the initial power up.
R5
6
OEM Version
Typical Performance Graphs
THD vs. Power (1kHz, 4Ω)
1
0.5
0.2
0.1
0.05
%
0.02
0.01
0.005
0.002
0.001
10m
20m
50m
100m
200m
500m
1
2
5
10
20
50
100
200
500
800
W
THD vs. Frequency (8Ω)
1
0.5
0.2
0.1
0.05
%
0.02
0.01
0.005
0.002
0.001
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
From top to bottom: 40W, 10W, 1W
R5
7
OEM Version
Frequency Response (4Ω, 8Ω and open circuit)
+10
+5
d
B
r
+0
A
-5
-10
20
50
100
200
500
1k
2k
5k
10k
20k
50k 100k
Hz
From top to bottom: open circuit, 8Ω, 4Ω
Output Impedance
1
500m
200m
O
h
m
s
100m
50m
20m
10m
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
19+20kHz IMD (10W, 4Ω)
+0
-20
d
B
r
-40
-60
-80
A
-100
-120
-140
0
2k
4k
6k
8k
10k
12k
14k
16k
18k
20k
Hz
R5
8
OEM Version
Heatsink drill pattern. Top view.
1. UNC 8-32
2. Metric M4
R5
9
OEM Version
Revision
R4
R5
PCB Version
UcD700OEMV3
UcD700OEMV4
Description
- User selectable input signal routing. The input buffer and coupling caps
can be bypassed for direct comparator driving. Default jumpers are set
for AC-coupled input buffering.
- Amp_Ready output added.
- Clip detection output added.
- UNC 8-32 heatsink mounting holes (2x) added.
- Dual opamp footprint removed.
- Solder jumper ‘on/off select’ via J8/J10 removed*.
- Solder jumpers ‘J8 signal in’/’J10 signal’ in removed*.
* Both on/off and input signals are connected to J8 and J10.
Remains fully compatible with previous versions.
R5
10