Datasheet > LYT4318E

LYT4318E

更新时间： 2022-09-29 19:31:39

品牌	Logo	应用领域
帕沃英蒂格盛 - POWERINT		驱动
页数	文件大小	规格书
20页	2359K
描述
IC LED DRIVER OFFL DIM ESIP-7C

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数据手册

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LYT4318E 数据手册

LYT4211-4218/4311-4318

DRAIN (D)

5.9 V

REGULATOR

BYPASS (BP)

BYPASS

CAPACITOR

SELECT

SOFT-START

TIMER

HYSTERETIC

THERMAL

SHUTDOWN

FAULT

PRESENT

I_LIM

M_I

5.9 V

5.0 V

AUTO-RESTART

COUNTER

BYPASS PIN

UNDERVOLTAGE

Gate

Driver

1 V

VOLTAGE

MONITOR (V)

SenseFet

LEB

STOP

LOGIC

JITTER

CLOCK

Comparator

OSCILLATOR

FB_OFF

3-V_T

DC_MAX

OCP

LINE

SENSE

CURRENT LIMIT

COMPARATOR

I_LIM

I_V

FEEDBACK (FB)

PFC/CC

CONTROL

V_SENSE

V_BG

M_I

I_FB

FB_OFF

FEEDBACK

SENSE

DC_MAX

I_S

REFERENCE

BLOCK

REFERENCE (R)

V_BG

6.4 V

PI-6843-071112

SOURCE (S)

Figure 4. Functional Block Diagram.

Pin Functional Description

DRAIN (D) Pin:

VOLTAGE MONITOR (V) Pin:

This pin is the power FET drain connection. It also provides

internal operating current for both start-up and steady-state

operation.

This pin interfaces with an external input line peak detector,

consisting of a rectiﬁer, ﬁlter capacitor and resistors. The

applied current is used to control stop logic for overvoltage (OV),

provide feed-forward to control the output current and the

remote ON/OFF function.

SOURCE (S) Pin:

This pin is the power FET source connection. It is also the

ground reference for the BYPASS, FEEDBACK, REFERENCE

and VOLTAGE MONITOR pins.

Exposed Pad

(Backside) Internally

Connected to

BYPASS (BP) Pin:

SOURCE Pin

E Package (eSIP-7C)

This is the connection point for an external bypass capacitor for

the internally generated ±.9 V supply. This pin also provides

output power selection through choice of the BYPASS pin

capacitor value.

L Package (eSIP-7F)

(Top View)

7 D

5 S

4 BP

3 FB

2 V

FEEDBACK (FB) Pin:

1 R

The FEEDBACK pin is used for output voltage feedback. The

current into the FEEDBACK pin is directly proportional to the

output voltage. The FEEDBACK pin also includes circuitry to

protect against open load and overload output conditions.

Exposed Pad

(backside) Internally

Connected to

SOURCE Pin (see

eSIP-7C Package

Drawing)

Lead Bend Outward

from Drawing

(Refer to eSIP-7F Package

Outline Drawing)

V BP

PI-5432-082411

REFERENCE (R) Pin:

This pin is connected to an external precision resistor and is

used to conﬁgure for dimming (LYT4311-4318) and non-TRIAC

dimming (LYT4211-4218) modes of operation.

Figure 5. Pin Conﬁguration.

www.powerint.com

Rev. B 02/13

1 234 5 6 7...20

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