Bourns Rectifier Diodes Short Form Brochure

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1 Bourns Rectifier Diodes Short Form Brochure Bridge Rectifier Diodes Schottky Bridge Rectifier Diodes Fast Response Rectifier Diodes Standard Rectifier Diodes Schottky Rectifier Diodes

2 Introduction Bourns Rectifier Diodes A rectifier is an electrical device used to convert alternating current (AC) which periodically reverses direction, to direct current (DC) which flows in only one direction. Bourns offers a wide variety of rectifier products including bridge rectifiers and discrete rectifiers. Bourns bridge rectifiers perform with higher forward current and low forward voltages for use in low voltage and high efficiency designs. Fast response rectifier diodes support fast reverse recovery time with high forward current capability for high speed switched-mode power supply applications. Standard rectifier diodes provide high forward current capability with low reverse leakage current, and Schottky rectifier diodes can perform with high forward current and low forward voltage for low heat dissipation. AC to DC and DC to DC converters are common applications of rectifier diodes. Bourns Rectifier Diode Product Offering Bridge Rectifier Diodes Schottky Bridge Rectifier Diodes Fast Response Rectifier Diodes Standard Rectifier Diodes Schottky Rectifier Diodes AC to DC Converter v D 4 D + v t D 2 D 3 I - t A bridge rectifier diode or four discrete rectifier diodes connected in a closed loop bridge configuration provide full-wave rectification from AC input into a DC output. The bridge rectifier diode blocks the current in the reverse direction and allows the current in the forward direction to keep the output current in one direction. During the positive half cycle of the supply, diodes D and D 2 conduct in series while diodes D 3 and D 4 are reverse biased and the current flows through the load. During the negative half cycle of the supply, diodes D 3 and D 4 conduct in series, but diodes D and D 2 switch OFF which are reverse biased. The current flowing through the load.

3 + D D 4 D 2 Load + D 3 Load DC to DC Converter v v t t Switched-mode DC to DC converters transform one DC voltage level to another, which may be higher (boost) or lower (buck), by storing the input energy temporarily and then releasing that energy to the output at a different voltage. When the switch is in the on-state, the rectifier diode blocks the reverse current and the energy is transferred from the input voltage source to the transformer and the output capacitor supplies energy to the output load. When the switch is in the off-state, the energy is transferred from the transformer to the output load and the output capacitor. On-State Off-State

4 Product Selection General Rectifier Diode Parameters Maximum Repetitive Peak Reverse Voltage (V RRM ) is the maximum voltage a rectifier diode can withstand in the reverse direction without breaking down or avalanching, and rectifier diodes must have a peak inverse voltage rating higher than the maximum voltage being applied to them in the application. Maximum Average Forward Rectified Current (I F ) is the maximum allowable average forward current in the normal operating temperature range. Symbol Parameter Unit Description V RRM I F I FSM Maximum Repetitive Peak Reverse Voltage Maximum Average Forward Rectified Current Maximum Peak Forward Surge Current V A A Maximum allowable repetitive instantaneous value of the diode s reverse voltage Maximum allowable average forward current Maximum allowable non-repetitive half-sine wave surge current V F Forward Voltage V Voltage of the diode at I F I R Reverse Leakage Current µa Reverse leakage current at V RRM C J Junction Capacitance pf Junction capacitance of the diode Maximum Peak Forward Surge Current (I FSM ) is the maximum allowable non-repetitive half-sine wave surge current with a pulse width of 8.3 milliseconds. T rr Reverse Recovery Time ns R ΘJA Thermal Resistance to Air C/W Duration of time for diode to turn off when alternating current is from forward-bias to reversebias polarity Temperature difference between junction and outside air per watt Forward Voltage (V F ) is the rectifier diode s forward voltage and low V F rectifier diodes have less power dissipation in the forward direction to save energy. Reverse Leakage Current (I R ) is the diode's reverse leakage current, and low I R rectifier diodes have less power dissipation in the reverse direction for power reduction. Junction Capacitance (C J ) is the junction capacitance, and Reverse Recovery Time (T rr ) is the turn-off delay from the forward direction to the reverse direction. Low junction capacitance and fast reverse recovery time rectifier diodes are used for high-speed switching converter applications. Thermal Resistance to Air (R ΘJA ) is the resistance to heat flow. Low thermal resistance rectifier diodes generate less heat, making them a good quality insulator.

5 Bridge Rectifier Selection Start Is Low Voltage Required? No Schottky Bridge Rectifier Diodes Bridge Rectifier Diodes Discrete Rectifier Selection Start Is a Fast Response Required? No Fast Response Rectifier Diodes Is Low Forward Voltage Required? Schottky Rectifier Diodes No Standard Rectifier Diodes

6 Rectifier Diode Flyback Converter Topology Forward Topology Two-Switch Forward Topology Max. Power (W) 00 Strengths Weaknesses Ground referenced switch, multiple outputs, fewer components Limited to 0 A output, high stress on diode, inefficient (use of ZVS converters improves losses) AC/DC and DC/DC appliances, solar inverters, LED lighting, AC adaptors, E-meters, battery chargers, automotive, circuit breakers, TVs, STBs, PoE Max. Power (W) 200 Strengths Large step-down ratio Weaknesses High voltage on-switch increases power lost AC/DC, DC/DC industrial controls Max. Power (W) 000 Strengths Very rugged circuit Weaknesses Noisy input AC/DC, DC/DC industrial controls Half Bridge Forward Topology Full Bridge Forward Topology Full Bridge Resonant Topology Max. Power (W) 500 Strengths Reduced core loss Weaknesses Does not work well with current mode, making it less than ideal for off-line power supplies DC/DC industrial controls, telecom, data processing Max. Power (W) 5000 Strengths Clamped primary switch and minimal switching losses Weaknesses Requires experience to get functioning properly AC/DC and DC/DC industrial controls, telecom, data processing, automotive HEV / EV Max. Power (W) 5000 Strengths Soft switching Weaknesses Narrow input range Lighting Push Pull Converter Topology Boost Converter Topology Buck Converter Topology Max. Power (W) 500 Strengths Ground referenced switches No Max. Power (W) 000 Strengths Low noise input No Max. Power (W) 000 Strengths Low noise output Weaknesses Limited to low input voltages Weaknesses Requires current mode control and has no isolation Weaknesses Optimum input/output ratio must be less than 0; no isolation DC/DC battery chargers, servers AC/DC and DC/DC power factor correction circuits, automotive electric vehicles, motor drives (appliances) AC/DC and DC/DC notebooks, servers, graphic processors, automotive

7 Bridge Rectifier Diodes Part Number V RRM I F I FSM V I F I R (µa) Capacitance (pf) Compliant Package Length Width R ΘJA ( C/W) Features High current capability Low profile package Switch Mode Power Supplies (SMPS) Power Supplies CD-DF40SL 000 CD-DF408SL 800 CD-DF406SL 600 CD-DF40S 000 CD-DF408S 800 CD-DF406S 600 CD-MBL20SL 000 CD-MBL208SL 800 CD-MBL206SL 600 CD-MBL20S 000 CD-MBL208S 800 CD-MBL206S 600 CD-MBL0SL 000 CD-MBL08SL 800 CD-MBL06SL 600 CD-MBL0S 000 CD-MBL08S 800 CD-MBL06S 600 CD-MBL04S 400 CD-MBL02S 200 CDNBS04-B CDNBS04-B CDNBS04-B CDNBS04-B DFS NBS

Schottky Bridge Rectifier Diodes Part Number V RRM I F I FSM V F @ I F I R (µa) Capacitance (pf) Compliant

Switch Mode Power Supplies (SMPS) Power Supplies CD-HD20L 00 60 0.8 00 45 CD-HD2006L 60 0.55 CD-HD2004 40 2 0.

8 Schottky Bridge Rectifier Diodes Part Number V RRM I F I FSM V I F I R (µa) Capacitance (pf) Compliant Package Length Width R ΘJA ( C/W) Features High current capability Low forward voltage Low profile package Switch Mode Power Supplies (SMPS) Power Supplies CD-HD20L CD-HD2006L CD-HD CD-HD TO-269AA CD-HD CD-HD CD-HD CD-HD

9 Fast Response Rectifier Diodes Part Number V RRM I F T rr (ns) I FSM V I F I R (µa) Capacitance (pf) Compliant Package Length Width R ΘJA ( C/W) Features High current capability Fast reverse recovery time High Frequency Switch Mode Power Supplies Inverters CD24C-F CD24C-F CD24C-F DO-24AB/SMC CD24C-F CD24C-F CD24B-F CD24B-F CD24B-F CD24B-F DO-24AA/SMB CD24B-F CD24B-F CD24B-F CD24B-F CD24B-F CD24B-F DO-24AA/SMB CD24B-F CD24B-F CD24A-F CD24A-F CD24A-F CD24A-F DO-24AC/SMA CD24A-F CD24A-F CD408-FU CD408-FU CD408-FU SOD-87 /SOD CD408-FU CD408-FF CD408-FF CD408-FF SOD-87 /SOD CD408-FF CD408-FF CD408-FF CD408-F CD408-F CD408-F SOD-87 /SOD CD408-F CD408-F

10 Standard Rectifier Diodes Part Number V RRM I F I FSM V I F I R (µa) Capacitance (pf) Compliant Package Length Width R ΘJA ( C/W) Features High current capability Low reverse leakage current Switch Mode Power Supplies (SMPS) Inverters CD24C-R CD24C-R CD24C-R CD24C-R DO-24AB/SMC CD24C-R CD24C-R CD24C-R CD24B-R CD24B-R CD24B-R CD24B-R DO-24AA/SMB CD24B-R CD24B-R CD24B-R CD24B-R CD24B-R CD24B-R CD24B-R DO-24AA/SMB CD24B-R CD24B-R CD24B-R CD24A-R CD24A-R CD24A-R CD24A-R CD24A-R CD24A-R CD24A-R CD24A-R CD24A-R CD24A-R00 00 CD24A-R50 50 CD408-R CD408-R CD408-R CD408-R CD408-R DO-24AC/SMA SOD-87 /SOD

Schottky Rectifier Diodes Features High current capability Low forward voltage Switch Mode Power Supplies (SMPS) Inverters Part Number V RRM I F I FSM V F @ I F I R (µa) Capacitance (pf) Compliant

11 Schottky Rectifier Diodes Features High current capability Low forward voltage Switch Mode Power Supplies (SMPS) Inverters Part Number V RRM I F I FSM V I F I R (µa) Capacitance (pf) Compliant Package Length Width CD24C-B360LF CD24C-B350LF CD24C-B340LF DO-24AB/SMC CD24C-B330LF CD24C-B320LF CD24B-B360LF CD24B-B350LF CD24B-B340LF DO-24AA/SMB CD24B-B330LF CD24B-B320LF CD24A-B360LF CD24A-B350LF CD24A-B340LF CD24A-B340LLF CD24A-B330LF CD24A-B320LF CD24B-B260LF CD24B-B250LF DO-24AC/SMA CD24B-B240LF DO-24AA/SMB CD24B-B230LF CD24B-B220LF CD24A-B260LF CD24A-B250LF CD24A-B240LF CD24A-B240LLF DO-24AC/SMA CD24A-B230LF CD24A-B220LF CD206-B CD206-B CD206-B SOD-87 /SOD CD206-B CD24B-B60LF CD24B-B50LF CD24B-B40LF DO-24AA/SMB CD24B-B30LF CD24B-B20LF CD24A-B00LF CD24A-B90LF CD24A-B80LF CD24A-B70LF CD24A-B60LF CD24A-B50LF DO-24AC/SMA CD24A-B40LF CD24A-B30LF CD24A-B30LLF CD24A-B20LF CD24A-B20LLF CD200-B CD200-B SOD CD26A-B40LF CD26A-B30LLF CD26A-B20LLF DO-26AA CD26A-B20RLF CD23D-B20R CD23D-B40R SOD CD23D-B40LR CD0603-B0240R CD0603-B0340R (608 metric) R ΘJA ( C/W)

Worldwide Sales Offices Country/Region Phone Email Americas: +-95-78-5500 americus@bourns.com Brazil: +55 5505 060 americus@bourns.com China: +86 2 6482250 asiacus@bourns.

12 Worldwide Sales Offices Country/Region Phone Americas: Brazil: China: asiacus@bourns.com Europe, Middle East, Africa: eurocus@bourns.com Japan: asiacus@bourns.com Korea: asiacus@bourns.com Singapore: asiacus@bourns.com Taiwan: asiacus@bourns.com Other Asia-Pacific Countries: asiacus@bourns.com Technical Assistance Region Phone Asia-Pacific: techweb@bourns.com Europe, Middle East, Africa: eurotech@bourns.com Americas: techweb@bourns.com Bourns products are available through an extensive network of manufacturer s representatives, agents and distributors. To obtain technical applications assistance, a quotation, or to place an order, contact a Bourns representative in your area. Specifications subject to change without notice. Actual performance in specific customer applications may differ due to the influence of other variables. Customers should verify actual device performance in their specific applications. "Bourns is a registered trademark of Bourns, Inc. in the U.S. and other countries. COPYRIGHT 207, BOURNS, INC. LITHO IN U.S.A. 0/7 e/esd79

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