Working Principle and Selection of Schottky Diodes — SUNMATE

Working Principle and Selection of Schottky Diodes

Schottky's working principle

Schottky diode is a metal semiconductor made by utilizing the potential barrier formed on the contact surface of a metal semiconductor with rectification characteristics

Conductor devices. As a low-voltage, high-frequency rectifier or rectifier bridge, polarity protection diode, suitable for compact,

A small system. Typical applications for AC-DC and DC-DC converters, battery polarity protection, and various voltages

The application of ORing and other small-scale systems.

SBR is often used as a low-voltage, high-frequency rectifier or rectifier bridge, polarity protection diode.

The characteristics of Schottky:

1. Extremely low forward voltage drop

2. High efficiency achieved due to extremely low forward voltage

3. High continuous current function

4. Small and subminiature surface mount packaging that can save space

5. High peak current function

6. Excellent size/performance ratio and longer battery life

7. Low power consumption and low heat generation

8. High speed switch combined with low reverse current

9. Durable design and longer product lifespan

Application of Schottky:

1. Small and medium-sized power rectification

2. Low power applications

3. Power management circuit, especially DC to DC conversion

4. Continuous current diode for inductive load of relays and motors

5. Reverse polarity protection

Basic parameters:

V RRM, V RMS, V DC, I F (AV), I R, R θ JL, R θ JA, T J, T STR, I FSM, VF.

Classification of Schottky diodes:

Classified by current: 1A, 2A, 3A, 5A, etc;

According to the packaging type, there are: SMA, SMB, SMC, SOT23, etc.

Main models of Schottky diodes:

SMA (1A): SS12, SS13, SS14, SS15, SS16, SS18, SS19, SS110, SS115, SS120,

SMA/SMB (2A): SS22, SS23, SS24, SS25, SS26, SS28, SS29, SS210, SS215, SS220,

SMA/SMB (3A): SS32, SS33, SS34, SS35, SS36, SS38, SS39, SS310, SS315, SS320,

SMC (3A): SK32, SK33, SK34, SK35, SK36, SK38, SK39, SK310, SK315, SK320,

SMC (5A): SK52, SK53, SK54, SK55, SK56, SK58, SK59, SK510, SK515, SK520,

SOT23: BTA54, BAT54A, BAT54C, BAT54S