Datasheet > KBP105G

KBP105G

更新时间： 2024-01-18 00:02:29

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		二极管
页数	文件大小	规格书
42页	307K
描述
APPLICATION NOTE

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技术参数
数据手册

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KBP105G 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	R-PSIP-W4	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8541.10.00.80
风险等级：	5.75	Is Samacsys：	N
其他特性：	UL RECOGNIZED	最小击穿电压：	600 V
配置：	BRIDGE, 4 ELEMENTS	二极管元件材料：	SILICON
二极管类型：	BRIDGE RECTIFIER DIODE	最大正向电压 (VF)：	1.1 V
JESD-30 代码：	R-PSIP-W4	湿度敏感等级：	1
最大非重复峰值正向电流：	30 A	元件数量：	4
相数：	1	端子数量：	4
最高工作温度：	150 °C	最低工作温度：	-55 °C
最大输出电流：	1 A	封装主体材料：	PLASTIC/EPOXY
封装形状：	RECTANGULAR	封装形式：	IN-LINE
认证状态：	Not Qualified	最大重复峰值反向电压：	600 V
子类别：	Bridge Rectifier Diodes	表面贴装：	NO
端子形式：	WIRE	端子位置：	SINGLE
Base Number Matches：	1

KBP105G 数据手册

AN1262

APPLICATION NOTE

OFFLINE FLYBACK CONVERTERS DESIGN

METHODOLOGY WITH THE L6590 FAMILY

by Claudio Adragna

The design of flyback converters is quite a demanding task that requires SMPS engineers to cope with sev-

eral problem areas such as magnetics, control loop analysis, power devices, as well as regulations concern-

ing safety, EMC and the emerging standby consumption requirements. Lots of variable are involved and

complex tradeoffs are necessary to meet the goal.

In this scenario, the high-voltage monolithic switchers of the L6590 family greatly simplify the task and, at

the same time, allow to build robust and cost-effective low-power systems.

In this application note, after a review of flyback topology, a step-by-step design procedure of an offline sin-

gle-output flyback converter will be outlined. As an example, the design of the test board will be carried out

in details.

FLYBACK BASICS

Flyback operation will be illustrated with reference to the basic circuit and the waveforms of fig. 1. It is a two-

step process. During the ON-time of the switch, energy is taken from the input and stored in the primary winding

of the flyback transformer (actually, two coupled inductors). At the secondary side, the catch diode is reverse-

biased, thus the load is being supplied by the energy stored in the output bulk capacitor.

Figure 1. Flyback Topology and associated waveforms.

Vin

Vout

Vac

n:1

Vcc

Max. Duty cycle

DRAIN

L6590

L6590D

L6590A

Driver

ISOLATED

FEEDBACK

Clock

OSCILLATOR

2.5 V

1/100

Rsense

PWM

OCP

VFB

E/A

LEB

Clock

0.5 V

GND

COMP

FREQUENCY

COMPENSATION

CLOCK

∆

Vdrain

n•Vout

Vin

DCM operation

TRANSITION

CCM operation

May 2001

1/42

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