Datasheet > LNK562_08

LNK562_08

更新时间： 2022-11-14 09:21:06

品牌	Logo	应用领域
帕沃英蒂格盛 - POWERINT		变压器开关
页数	文件大小	规格书
16页	857K
描述
Energy Effi cient Off-Line Switcher IC for Linear Transformer Replacement

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LNK562_08 数据手册

LNK562-564

Conditions

SOURCE = 0 V; T_J= -40 to 125 °C

See Figure 8

Parameter

Symbol

Min

Typ

Max

Units

(Unless Otherwise Speciﬁed)

OUTPUT (cont.)

FEEDBACK Pin

Auto-Restart

V_FB(AR)

T_J= 25 °C

0.8

Threshold Voltage

V_FB= V_FB(AR)

Auto-Restart

ON-Time

100

T_J= 25 °C

Auto-Restart

Duty Cycle

DC_AR

NOTES:

A. In a scheme using a resistor divider network at the FB pin, where R_Uis the resistor from the FB pin to the rectiﬁed

bias voltage and R_Lis the resistor from the FB pin to the SOURCE pin, the output voltage variation is inﬂuenced

by V_FBand I_FBvariations. To determine the contribution from the V_FBvariation in percent, the following equation

can be used:

R_U+ R

R_L

R_U+ R

R_L

_FB(MAX)c

^Lm

+ I_FB(TYP)R_U

^Lm

+ I_FB(TYP)R_U

x = 100 #

- 1

V_FB(TYP)

To determine the contribution from I_FBvariation in percent, the following equation can be used:

R_U+ R

R_L

R_U+ R

R_L

_FB(TYP)c

^Lm

+ I_FB(MAX)R_U

^Lm

+ I_FB(TYP)R_U

y = 100 #

- 1

V_FB(TYP)

Since I_FBand V_FBare independent parameters, the composite variation in percent would be

! x + y

B. Total current consumption is the sum of I_S1and I_DSSwhen FEEDBACK pin voltage is ≥2 V (MOSFET not

switching) and the sum of I_S2and I_DSSwhen FEEDBACK pin is shorted to SOURCE (MOSFET switching).

C Since the output MOSFET is switching, it is difﬁcult to isolate the switching current from the supply current at the

DRAIN. An alternative is to measure the BYPASS pin current at 6 V.

D. See Typical Performance Characteristics section Figure 16 for BYPASS pin startup charging waveform.

E. This current is only intended to supply an optional optocoupler connected between the BYPASS and FEEDBACK

pins and not any other external circuitry.

F. This parameter is guaranteed by design.

G. This parameter is derived from characterization.

H. Breakdown voltage may be checked against minimum BV_DSSby ramping the DRAIN pin voltage up to but not

exceeding minimum BV_DSS

Rev. H 11/08

1...7 8 91011 12 13...16

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