VRAF-08AT50G [BEL]
DC-DC Regulated Power Supply Module, 1 Output, 7.2W, Hybrid, ROHS COMPLIANT, SIP-5;
| 型号： | VRAF-08AT50G |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 7.2W, Hybrid, ROHS COMPLIANT, SIP-5 |
| 文件： | 总8页 (文件大小：156K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
VRAF-08xT50
RoHS Compliant
Rev.J
•
•
•
•
•
Non-Isolated
High Efficiency
Fixed Frequency
Low Cost
•
•
•
•
•
Under-Voltage Lockout
Output Enable
OCP/SCP
Current Source/Sink Capability
Tracking a Reference for
Output Voltage
Over Voltage Protection
(Hiccup Mode)
•
High Power Density
Description
The Bel VRAF-08xT50 module is a non-isolated, step down dc/dc power converter that operates from a nominal
12 Vdc or wide range 5 Vdc to 13.8 Vdc source. This converter is designed specifically to provide bus termination
voltages in applications such as DDR (double data rate) memory where the bus termination voltage must closely
track the I/O bus voltage. The converter accepts a reference input and uses this to program its output voltage to
50% of the reference. The unit is packaged in compact single-in-line footprint and provides a maximum 8 A
output. Standard features include remote on/off, input under-voltage lockout, output over voltage protection.
Part Selection
Output
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Input Voltage
Voltage
0.9 V
0.9 V
5.0 V - 13.8 V
5.0 V - 13.8 V
8 A
8 A
7.2 W
7.2 W
69%
69%
VRAF-08AT50
VRAF-08ET50
Notes: 1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
2. Add “G” suffix at the end of the model numbers listed above to indicate “Tray Packaging”.
3. Part number VRAF-08ET50 is better suited for applications where start up is guaranteed at 5V input.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Notes
Input Supply Voltage
-0.5 V
-
15 V
Input Signal Voltage
Operating Temperature
Storage Temperature
-0.3 V
0 °C
5.25 V
70 °C
85 °C
-
-
-40 °C
Note: All specifications are typical at 25 °C unless otherwise stated.
Input Specifications
Parameter
Min
Typ
Max
Notes
Operating Input Voltage
VRAF-08AT50
VRAF-08ET50
5.0 V
5.0 V
12 V
12 V
13.8 V
13.8 V
Input Current (full load)
VRAF-08AT50
VRAF-08ET50
-
-
-
-
2.2 A
2.2 A
Input Current (no load)
-
1.2 V
-
25 mA
1.8 V
7 mA
35 mA
1.89 V
10 mA
Reference Voltage Range (Vddq)
Remote Off Input Current
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Input Specifications (continued)
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Parameter
Min
Typ
Max
Notes
With simulated source impedance
of 1000 nH, 5 Hz to 20 MHz. Use a
100 uF/25 V Tan cap with
ESR=0.025 ohm max, at 100
kHz@25°C.
Input Reflected Ripple Current (pk-pk)
-
110 mA
180 mA
Input Reflected Ripple Current (rms)
-
25 mA
60 mA
I2t Inrush Current Transient
Turn on Voltage Threshold
Turn off Voltage Threshold
-
0.006 A2s
0.012 A2s
3.9 V
2.6 V
2.4 V
-
-
3.7 V
Notes: 1. All specifications are typical at 25 °C unless otherwise stated.
2. This power module is not internally fused. An input line fuse must always be used.
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
-
Vddq/2
-
Vin=12 V, lout=full load
Tracking Tolerance
(Vddq/2-Vout)/Vout
-1.5%
-
1.5%
Load Regulation
Line Regulation
-
-
3 mV
6 mV
6 mV
8 A
3 mV
Output Current
0 A
9.2 A
-
-
Output DC Current Limit
14 A
Test conditions:
0-20 MHz BW, with a 22 uF / 6.3 V
ceramic capacitor at the output.
Output Ripple and Noise (pk-pk)
Output Ripple and Noise (rms)
-
-
-
25 mV
50 mV
15 mV
2.2 A2s
8 mV
Short Circuit Surge Transient
Turn on Time
1.1 A2s
VRAF-08AT50
VRAF-08ET50
-
2.5 mS
5 mS
5 mS
8 mS
Start up from ENABLE.
Overshoot at Turn on
Output Capacitance
Transient Response
50% ~ 100% Max Load
Settling Time
-
0%
-
3%
0 uF
2200 uF
-
-
-
-
100 mV
20 uS
200 mV
di/dt=0.3 A/uS; Vin12 V; and
with a 22 uF / 6.3 V ceramic
capacitor at the output.
50 uS
200 mV
50 uS
VO =0.9 V
100% ~ 50% Max Load
Settling Time
100 mV
20 uS
Note: All specifications are typical at Vin =12 V, Vddq=1.8 V, Io=8 A, Ta= 25°C unless otherwise stated.
General Specifications
Parameter
Min
68%
Typ
69%
Max
-
Notes
Efficiency
Vin=12 V, Vddq=1.8 V, Io=8 A
Switching Frequency
260 kHz
300 kHz
340 kHz
Calculated Per Bell Core SR-332 (IO =
80% load; Vin=12 V; Ta = 25 °C)
MTBF
6,416,286 hours
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
0.65 x 0.41 x 0.40
16.51 x 10.41 x 10.16
Weight
-
2.5 g
-
Note: All specifications are typical at 25 °C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Control Specifications
Parameter
Min
Typ
Max
Notes
Output Enable
ENABLE High
ENABLE Low
2 V
0 V
-
-
5.5 V
0.8 V
Enable Pin open, the module is off.
Efficiency Data
Efficiency Curve
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
45.0%
10.8 V
12.0 V
13.2 V
0.8
2.0
4.0
6.0
8.0
Output Current (A)
VRAF-08AT50
Efficiency Curve
85.0%
75.0%
65.0%
55.0%
45.0%
5.0V
12.0V
13.8V
0.8
2.0
4.0
6.0
8.0
Output Current (A)
VRAF-08ET50
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Thermal Derating Curve
The thermal reference point Tref is shown above. For reliable operation this temperature should not exceed
115°C. The output power of the module should not exceed the rated power for the module.
Vin=12 V, Vddq=1.8 V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Ripple and Noise Waveform
Note: Ripple and noise at Vin=12 V, Vddq=1.8 V, Io=8 A, with a 22 uF/6.3 V X5R ceramic capacitor at the output,
Ta=25 °C.
Transient Response Waveforms
50% to 100% load step at Vin=12 V, Vddq=1.8 V
100% to 50% load step at Vin=12 V, Vddq=1.8 V
Note: Transient response at di/dt=0.3 A/uS, with 22 uF/6.3 V X5R ceramic capacitor at the output, Ta=25 °C.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Output Tracking
Test condition: Vin=12 V, Vddq=1.8 V, Io=8 A.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mechanical Outline
Pin Connections
Pin
Function
1
Vin
2
Vddq
Vout
3
4
GND
5
Enable
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 / 8 A Output
Dec. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Revision History
Date
Revision
Changes Detail
Approval
HL
Update the input range for VRAF-08AT50 and add note 3 for VRAF-
08ET50 on first page.
2010-02-26
2010-12-03
I
J
Add pin length in the MD.
XF
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
©2010 Bel Fuse Inc. Specifications subject to change without notice. 120310
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
Bel Fuse Ltd.
Bel Fuse Europe Ltd.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
8F/ 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
相关型号：
VRAF-08AT51G
DC-DC Regulated Power Supply Module, 1 Output, 7.2W, Hybrid, ROHS COMPLIANT PACKAGE-5
BEL
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