Technical Reference Notes
ALD_AED17Q50 Series
(9.6V Bus Converter)
9.6V @ 150W 16
th
Brick Bus Converter
The ALD17Q50 and AED17Q50 series is Astec’s latest 5:1 fixed ratio open-loop Bus Converter offering in an industry standard
16
th
brick package. It’s designed to operate from an input voltage range of 38V to 55V and to deliver 150W of output power at
96% efficiency. The converters are offered either in low profile openframe (ALD) or with integrated heatplate/heatsink (AED)
construction for optimum flexibility. The series comes with industry standard features such as Input UVLO and OVP; non-latching
OCP and OTP. With its wide operating temperature range of -40°C to 85°C ambient and construction options, the converters are
deployable into almost any environment.
Electrical Parameters
Input
Input Range
Input Surge
Input OVP
38-55 VDC
60V / 100ms
110% Vin,max (typ)
Control
Enable
Positive or Negative Logic
Enable Options
Special Features
•
•
•
•
•
•
•
•
Industry Standard 16
th
Brick outline
Up to 96% Efficiency
Low Ripple and Noise
High Capacitive Load Start-up
Fixed Switching Frequency
Industry standard features: Input UVLO;
Enable; non-latching OVP, OCP and OTP;
Meets Basic Insulation
EU Directive 2002/95/EC compliant for RoHS
Output
Output Current
Ripple and Noise
Over Current
Protection
Over Temperature
Protection
Up to 17A max
90mV
P-P
180% Io,max (typ)
110
°C
Environmental Specifications
•
•
•
-40ºC to 85ºC Operating Temperature
-40ºC to 125ºC Storage Temperature
MTBF > 1 million hours
Safety
UL + cUL 60950-1, Recognized
EN60950-1 through TUV-PS
Electrical Specifications
MODEL: ALD_AED17Q50 SERIES
APRIL 10, 2006 – REVISION A1
SHEET 1 OF 11
Technical Reference Notes
ALD_AED17Q50 Series
(9.6V Bus Converter)
Electrical Specifications
ABSOLUTE MAXIMUM RATINGS
Stresses in excess of the absolute maximum ratings can cause permanent damage to the converter. Functional operation of
the device is converter is not implied at these or any other conditions in excess of those given in the operational section of
the specs. Exposure to absolute maximum ratings for extended period can adversely affect device reliability.
Parameter
Input Voltage
Continuous
Transient (100ms)
Isolation Voltage
Input to Output
Operating Temperature
Storage Temperature
Operating Humidity
Max Voltage at Enable Pin
Max Output Power
Device
All
Symbol
V
IN
V
IN, trans
All
All
All
All
All
All
Min
-0.3
-
1500
-40
-55
10
-0.6
-
Typ
-
-
-
-
-
-
-
-
Max
55
60
-
85
125
85
25
150
Unit
Vdc
Ta
T
STG
-
Vdc
ºC
ºC
%
Vdc
W
INPUT SPECIFICATIONS
Parameter
Operating Input Voltage Range
Input Under-Voltage Lock-out
T_ON Threshold
T_OFF Threshold
Input Current
1
(V
IN
= V
IN, Min
; I
O
= I
O, Max
)
Max P
diss
@ I
O
= 0A
(V
IN
= V
IN, Nom
; T
A
≥
25°C)
Input Ripple Current
2
I
O
= I
O, Max
5Hz to 20MHz
Input Voltage Rise Time
10% to 90% of Vout
Inrush Current
Input Overvoltage Shutdown
Turn Off Threshold
Turn-On Threshold
Device
All
All
Symbol
V
IN
Min
38
33.0
34.0
-
-
I
I1
-
Typ
48
36.5
35.5
3.3
2
10
Max
55
38.0
36.0
4
3.1
30
Unit
Vdc
Vdc
A
W
mAp-p
All
All
All
I
IN-MAX
All
All
All
I
2
t
-
-
57
55
1
0.01
-
V/ms
A
2
s
65
62
V
MODEL: ALD_AED17Q50 SERIES
APRIL 10, 2006 – REVISION A1
SHEET 2 OF 11
Technical Reference Notes
ALD_AED17Q50 Series
(9.6V Bus Converter)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Output Voltage over line load
and temperature
Output Ripple and Noise
3
Peak-to-Peak
Io = Io,max
BWL = 20 MHz
Device
All
All
Symbol
V
O
Min
6.8
Typ
9.6
90
Max
11.55
150
Unit
Vdc
mVp-p
Output Current
4
Efficiency
Io = Io
max
V
in
= V
in nominal
Ta = 25ºC
All
All
I
O
η
0
94.5
-
95.5
17
97
A
%
External Load Capacitance
Capacitor ESR
Output Current-limit Inception
Vo = 90% Vo,set
Non-latching / auto-recovery.
All
All
C
EXT
I
O,OCP
-
4
18
-
-
-
5,000
-
44
µF
mΩ
A
Over Temperature Protection
Auto-recovery
Input to Output Turn-On Delay
Io = Io,max
All
All
All
All
All
-
-
-
F
SW
110
-
-
-
-
-
-
-
-
165
120
30
20
20
-
°C
ms
Ms
Ms
KHz
Enable to Output Turn-On Delay
Io = Io,max
Turn-on Response Time
5
Io = Io,max
Switching Frequency
Dynamic Response
6
di/dt = 1A/
µ
s, 25% step
Peak Deviation
Settling time
Output Voltage Overshoot
Output Enable ON/OFF
Open collector TTL compatible
Positive Enable: Mod-ON
Mod-OFF
Negative Enable: Mod-ON
Mod-OFF
All
All
-
-
1
-
-
3
100
3
%
µs
%Vo
All
All
All
All
-
-
-
-
2.95
-0.5
-0.5
2.95
-
-
-
-
20
1.2
1.2
20
V
V
V
V
NOTE:
1. The converter is not internally fused; an external fuse is recommended (e.g. Littlefuse 465 series or
equivalent).
2. Please refer to Figure 1 for the Input Ripple Current test measurement setup.
3. Please refer to Figure 2 for the Output Ripple and Noise test measurement setup.
4. Output derating applies at elevated temperatures. See Figures 6 & 7.
5. Measured from 10% to 90% Vo.
6. Measured at Vin = 48V nominal and at specified max admissible output capacitance.
MODEL: ALD_AED17Q50 SERIES
APRIL 10, 2006 – REVISION A1
SHEET 3 OF 11
Technical Reference Notes
ALD_AED17Q50 Series
(9.6V Bus Converter)
Electrical Specifications (continued)
SAFETY AGENCY / MATERIAL RATING / ISOLATION
Parameter
Safety Approval
Material Flammability Rating
Parameter
Input to Output Capacitance
Input to output Resistance
Input to Output Insulation Type
Device
All
All
Device
All
All
All
UL/cUL 60950-1
TUV EN 60950-1
UL94V-0
Symbol
Min
-
-
-
Typical
1000
10
Basic
Max
-
-
-
Unit
pF
Mohms
-
TO OSCILLOSCOPE
Ltest
12 uH
BATTERY
Cs 220 uF
ESR < 0.1 OHM
@ 20 ºC, 100 kHz
33 uF
ESR < 0.7 OHM
@ 20 ºC, 100 kHz
Vi(+)
Vi(-)
Measure input reflected-ripple current with a simulated source inductance (Ltest) of 12 uH.
Capacitor Cs offsets possible battery impedance. Measure current as shown above.
Figure 1. Input Reflected Ripple Current Measurement Setup.
COPPER STRIP
Vo(+)
0.1 uF
Vo(-)
10 uF SCOPE
RESISTIVE
LOAD
Use a 0.1µF @50V X7R ceramic capacitor (connected an inch away from the output
terminals of the UUT) and a 10µF @ 25V tantalum capacitor (2 inches away from the output
terminals of the UUT). Scope measurement should be made using a BNC socket, positioned 3
inches away from output terminals of the converter.
Figure 2. Peak to Peak Output Noise Measurement Setup.
MODEL: ALD_AED17Q50 SERIES
APRIL 10, 2006 – REVISION A1
SHEET 4 OF 11
Technical Reference Notes
ALD_AED17Q50 Series
(9.6V Bus Converter)
Basic Operation and Features
INPUT UNDER VOLTAGE LOCKOUT
To prevent any false system turn on and turn off, the converter has been designed to turn-on once V
IN
is in the voltage range of 33-
38 VDC. Likewise, it has also been programmed to turn-off when V
IN
drops down to 34-36 VDC.
OUTPUT ENABLE
The converter comes with an Enable pin (PIN 2), which is primarily used to turn ON/OFF the converter. Both a Positive (no “N”
suffix required) and a Negative (suffix “N” required) Enable Logic options are being offered. Please refer to Table 2 for the Part
Numbering Scheme.
For Positive Enable, the converter is turned on when the Enable pin is at logic HIGH or left open. The unit turns off when the
Enable pin is at logic LOW or directly connected to -V
IN
. On the other hand, the Negative Enable version turns unit on when the
Enable pin is at logic LOW or directly connected to -V
IN
. The unit turns off when the Enable pin is at Logic HIGH.
INPUT OVER VOLTAGE PROTECTION (OVP)
OVP sensing is taken from the input line voltage. The Input Over Voltage Protection circuit is non-latching - auto recovery mode.
The converter will shut down once the input voltage reaches the OVP range. The converter will recover automatically once the
input voltage falls below the input OVP range.
OVER CURRENT PROTECTION (OCP)
The Over Current Protection is non-latching - auto recovery mode. The converter shuts down once the output current reaches the
OCP range. The converter will attempt to restart until the fault is removed. There is a 20-50ms lockout period between restart
attempts. Note that the OCP threshold will be reduced proportionally with the output voltage trim up and/or remote sense
compensation. The percent rise in output voltage will be proportional to the reduction in OCP current inception.
OVER TEMPERATURE PROTECTION (OTP)
The Over Temperature Protection circuit will shutdown the converter once the average PCB temperature (See Figure X for OTP
reference sense point) reaches the OTP range. This feature prevents the unit from overheating and consequently going into thermal
runaway, which may further damage the converter and the end system. Such overheating may be an effect of operation outside the
given power thermal derating conditions. Restart is possible once the temperature of the sensed location drops to less than 110°C.
TO SOURCE
+Vin
33uF
+Vo
0.1uF
10uF
L
O
A
D
-Vin
-Vo
Figure 3. Typical Application Circuit
MODEL: ALD_AED17Q50 SERIES
APRIL 10, 2006 – REVISION A1
SHEET 5 OF 11
模拟电子
