SRAH-02C50X [BEL]
NON-ISOLATED DC/DC CONVERTERS; 非隔离式DC / DC转换器
| 型号： | SRAH-02C50X |
| 厂家： | 
BEL FUSE INC. |
| 描述： | NON-ISOLATED DC/DC CONVERTERS |
| 文件： | 总6页 (文件大小：130K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NON-ISOLATED DC/DC CONVERTERS
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
xRAH-02C50x
RoHS Compliant
Rev.A
•
•
•
•
•
Non-Isolated
•
Allows Burst Mode Operation at
Low Load Currents for xRAH-
02C500, Burst Mode Operation
Disabled for Lower Output Ripple
at Light Loads for xRAH-02C50B
High Efficiency
Fixed Frequency (550 kHz)
Low Profile Package
Trim Function (Option)
•
UL60950-1 Recognized (UL/cUL)
Description
The Bel xRAH-02C50x is a part of the low cost non-isolated dc/dc converter series. The modules use a SMD or
SIP package for ease of layout and space savings. The output is closely regulated and the efficiency is typically
87% at full load.
Part Selection
Output
Input Voltage
Max. Output Max. Output
Typical
Part Number
Part Number
Voltage
Current
Power
Efficiency
Surface Mount
Vertical Mount
5.0 Vdc
3.0 Vdc - 3.6 Vdc
1.5 A
7.5 W
87%
SRAH-02C50x
VRAH-02C50x
Notes: 1. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel
Packaging”, and “G” for “Tray Packaging”.
2. Replace “x” with “0” to allow burst mode operation at low load currents, or with “B” to disable burst
mode operation at light loads.
3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Notes
Input Voltage (continuous)
2.8 V
-
4.0 V
Ambient Temperature
Storage Temperature
-
-
-40 °C
-40 °C
85 °C
125 °C
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
Input Current
3.0 V
-
3.6 V
-
-
-
3.3 A
Input Reflected Ripple Current
(rms)
With simulated source impedance
of 500 nH, 5 Hz to 20 MHz; Use
one 270 uF/16 V capacitor with
ESR = 0.018 ohm max. at 100 kHz
30 mA
60 mA
Input Reflected Ripple Current
(pk-pk)
-
100 mA
150 mA
I2t Inrush Current Transient
-
-
0.02 A2s
2.8 V
0.05 A2s
2.9 V
Turn-on Voltage Threshold
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
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
Load Regulation
4.825 V
5.0 V
5.175 V
Vin=3.3V, Io= full load
-
-
25 mV
20 mV
40 mV
30 mV
Line Regulation
Regulation Over Temperature
-
45 mV
80 mV
(0 °C to 70 °C)
Output Current
0 A
-
-
1.5 A
Ripple and Noise (RMS)
15 mV
25 mV
0-20MHz BW, with1uF ceramic
capacitor at the output.
Ripple and Noise (pk-pk)
-
50 mV
100 mV
Ripple and Noise (pk-pk) (No Load)
xRAH-02C500
xRAH-02C50B
-
-
50 mV
18 mV
-
-
Overshoot at Turn on
-
0%
-
5%
Output Capacitance
Transient Response
50% ~ 100% Max Load
0 uF
600 uF
-
-
-
-
100 mV
50 uS
150 mV
100 uS
150 mV
100 uS
di/dt = 0.5 A/uS; Vin = 3.3 V;
Ta = 25 °C without external
capacitor
Settling Time
100% ~ 50% Max Load
Settling Time
VO=5 V
100 mV
50 uS
Notes: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
Notes
Vin=3.3V, full load
Efficiency
84%
87%
-
Switching Frequency
Output Trim Range
500 kHz
95% VO
550 kHz
-
650 kHz
110% VO
Calculated Per Bell Core SR-332
(Vin=3.3 V; Vo=5 V; IO = 1.2 A; Ta =
25 °C)
MTBF
14,455,458 hours
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
Dimensions (vertical)
0.78 x 0.7 x 0.32
19.81 x 17.78 x 8.13
Inches (L × W × H)
0.7 x 0.308 x 0.65
Millimeters (L × W × H)
17.78 x 7.82 x 16.51
Weight
-
5.2 g
-
Note: All specifications are typical at nominal input, full load 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
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Output Trim Equations
Equations for calculating the trim resistor given the desired adjusted voltage (Vadj) and the nominal output
voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the
Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the
resistors should be used for any given application.
Vout
44.144
Rtrim-down
Rtrim_ down = (
−12.5)Kohm
− 2)Kohm
Module
Trim
GND
Vo −Vo,adj
8.4
Rtrim_ up = (
Vo, adj −Vo
Vout
Trim
GND
Module
Note: Output voltage Vo=5.004 V when Rtrim is open.
Rtrim-up
Efficiency Data
Efficiency Curve
89.0%
88.0%
87.0%
86.0%
85.0%
84.0%
83.0%
82.0%
3.0 V
3.3 V
3.6 V
0.150 0.375 0.750 1.125 1.500
Output Current (A)
xRAH-02C500
Efficiency Curve
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
78.0%
3.0 V
3.3 V
3.6 V
0.150 0.375 0.750 1.125 1.500
Output Current (A)
xRAH-02C50B
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
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Thermal Derating Curve
xRAH-02C50x
Ripple and Noise Waveforms
Ripple and noise at full load, Vin=3.3 V, Vo=5 V
Ripple and noise at no load, Vin=3.3 V, Vo=5 V
Note: Ripple and noise tested with 1 uF ceramic capacitor at the output, Ta=25 deg 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
3.0 Vdc - 3.6 Vdc Input
5.0 Vdc/1.5 A Output
Transient Response Waveforms
50% to 100% load transient at Vin=3.3 V, Vo=5 V
100% to 50% load transient at Vin=3.3 V, Vo=5 V
Note: Transient response at di/dt=0.5 A/uS, no external load capacitor, Ta=25 deg 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
3.0 V - 3.6 V Input
5.0 V/1.5 A Output
Mechanical Outline
SRAH-02C50x
Pin Connections
Pin
Function
bel
1
N/A
2
Vin
3
Ground
Vout
4
5
Trim (option)
N/A
6
7
N/A
VRAH-02C50x
Pin Connections
Pin
Function
bel
1
N/A
2
Vin
3
Ground
Vout
4
bel
5
Trim (option)
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products. These parts are not however
compatible with the higher temperatures associated with lead free solder processes and
must be soldered using a reflow profile with a peak temperature of no more than 240 °C.
©2007 Bel Fuse Inc. Specifications subject to change without notice. 010807
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
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