NON-ISOLATED DC/DC CONVERTERS

Transcription

1 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A POWER PRODUCTS S7AH-02C / V7AH-02C Modules Nonisolated Compact, low profile surface mount package Fixed frequency* High efficiency means less power dissipation Excellent thermal performance Optimized for cost ows burst mode operation at low load currents Description The Bel S7AH-02C and V7AH-02C modules are non-isolated, step up DC/DC power converters that operate from a nominal 3.3V source with an output voltage of 5V. They are packaged in a compact, overmolded package rated at.5a. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. Standard features include output voltage adjust and industrial temperature range (-40 to +85 C). The output is closely regulated and the efficiency is typically 87% at full load. These products may be used almost anywhere low voltage silicon is employed and a 3.3V source is available. applications include file servers, routers, line cards and other computing and communications equipment. *Optional Burst/skip mode operating at light load or no load. Applications Distributed power architectures Data networking equipment Telecommunications Computers and peripherals Options Trim function Part Number Selection Voltage Input Voltage Max. Current Max. Power Efficiency Part Number Surface Mount Part Number Vertical Mount 5V 3.3V.5A 7.5W 87% S7AH-02C500 V7AH-02C500 Note: For parts with Burst/skip mode disabled, change the last character to a B (e.g. S7AH-02C50B). page

2 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A Absolute Maximum Ratings Parameter Symbol Min Max Unit Continuous Input Voltage Vin V Enable Terminal Voltage Vouten V Ambient Temperature Storage Temperature Tamb C Tstor C Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC converter or may permanently damage the device. Input Specifications Parameter Module Symbol Min Max Units Operating Input Voltage Input Current Vin V Iin 3. 3 A Input Reflected Ripple Current ma rms Input Reflected Ripple Current (P-P) 50 mapk I 2 t Inrush Current Transient A 2 s Turn On Voltage Threshold V Note: Input capacitance one 270µF/6V, ESR = 0.08 Ω max at 25 C.. With simulated source impedance of 500nH, 5Hz to 20MHz. page 2

3 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A POWER PRODUCTS Specifications Parameter Module Symbol Min Max Units Voltage Set Point Vout V Load Regulation Line Regulation Regulation Over Temperature Total Voltage Regulation Ripple and Noise 50 p-p 2 Ripple and Noise 5 25 rms Current Range Iout 0. 5 A Overshoot at Turn On 0 5 % Capacitance Transient Response V 50% to % of Max Load Cout µ F 50 Settling Time Ts 50 µ s V % to 50% of Max Load 50 Settling Time Ts 50 µ s Note: specifications are typical at nominal input, full load at 25 C unless otherwise stated.. Vin = 3.3V, Iout = full load, Ta = 25 C MHz, µf ceramic cap on output. General Specifications Parameter Module Symbol Min Max Units Efficiency η % Switching Frequency Fsw khz 2 Voltage Trim Range 95 0 % Weight 5. 2 g. Vin=3.3V, full load and Ta=25 C. 2. See graphs on page 6. page 3

4 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A Efficiency Data Module 5.0V 89% 88% Efficiency 87% 86% 85% 84% 83% 82% current (A) 3.0V 3.3V 3.6V Ripple and Noise µf ceramic cap at the output. Ripple and noise at full load and 3.3Vdc input, 5Vdc output and Ta=25 C Ripple and noise when operating in burst mode at no load and 3.3Vdc input, 5Vdc output and Ta=25 C page 4

5 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A POWER PRODUCTS Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=5V 50% to % load transients at 3.3V input and Ta=25 C Vout=5V % to 50% load transients at 3.3V input and Ta=25 C Thermal Considerations x7ah-02c page 5

6 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A Trim Down Circuit Voltage Set-Point Adjustment Vout Rtrim Down Trim Gnd Trim Up Circuit Vout Module Trim Rtrim Up Gnd x7ah-02c Trim Resistor Calculation Rtrim down = ( Vo Vo, adj 2.5) Kohm Rtrim up = ( 8.4 Vo, adj Vo 2) Kohm page 6

7 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A POWER PRODUCTS Mechanical S7AH-02C [0.6] Suggested PCB Pad Layout [.65] 0.60 [5.24] [.27] [2.72] 0.0 [2.79] 0.70 [7.78] 0. [2.54] R0.05 [R0.38] typ R0.008 [R0.20] typ 0.02 [0.30] [.27] 0. [8.3] [2.54] [0.5] x [0.6] [9.8] [0.0] [.40] 2x [2.29] 2x Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.3] unless otherwise noted. Pin Function N/ A 2 +Vin 3 Ground 4 +Vo 5 Trim N/ A N/ A page 7

8 POWER PRODUCTS Mechanical V7AH-02C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V /.5A [7.78] [5.24] [.27] [6.73] min [.27] 0. [2.54] [0.6] [0.5] [7.82] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.3] unless otherwise noted. Pin Function N/ A 2 +Vin 3 Ground 4 +Vo 5 Trim CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ Tel Fax page 8 FAR EAST Bel Fuse Ltd. 8F / 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel Fax EUROPE Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR 8UD, U.K. Tel Fax