LC5710S datasheet(11/42 Pages) SANKEN

No de pièce	LC5710S

Description	Operation Types: The following converter types are applicable by the external circuit configuration

Download	42 Pages

Scroll/Zoom	100%

Fabricant	SANKEN [Sanken electric]

Site Internet	http://www.sanken-ele.co.jp/en

Logo

11 / 42 page

LC5710S DATA SHEET

Rev.1.9

Copy Right: SANKEN ELECTRIC CO., LTD.

Page.11

LED string current is detected by the current detection resistor, RCS.

The voltage of RCS is detected by both CSP and CSN pins. This IC compares this voltage with the Current Detection

Voltage, VCS, and makes a target value for current control.

The constant current is controlled so that the detection voltage of peak current of internal power MOSFET is close to

the target value, and thus the LED string current is constant.

The constant current of LED string, IOUT, is calculated by the following with RCS as the current detection resistor and

ROVP as the resistor for overvoltage protection in the case that LED string is open.

CS

OVP

CS

CSN

CS

OUT

R

)

R

(

I

V

I









･･･(2)

where;

ICSN : the CSN Pin Sink Current, 9.5μA.

VCS : the Current Detection Voltage, 100mV.

Also, IOUT can be expressed by the following, if ICSN×(RCS+ROVP) is negligibly small against VCS.

CS

OUT

R

V

I



･･･(3)

ROVP value should be chosen so that IOUT is within the acceptable accuracy range referring to the calculation in “8.5

Overvoltage Protection Function (OVP)”.

8.3 LED Dimming

8.3.1 Analog dimming

The dimming of LC5710S copes with both of Analog (the input of a DC voltage) and PWM-digital-Dimming.

Though it is Analog-dimming first, there are relations of the fig.8(A),(B) in the input DC voltage of the DIM pin and

the dimming-ratio. Moreover,Dimming by the Pull-down resistor RDIM is possible by using a internal current-source

of the IC, too. The relations of the DIM pin voltage and RDIM are shown by the figure 8 (B). Dimming ratio is 100%

when the DIM pin voltage is more than DC 2V.

fig.8(A) DIM Pin voltage vs. LED Current

fig.8(B) Pull-down resistor RDIM vs. DIM pin voltage

fig.8I The connection of RDIM and remote ON／OFF application

From the port of the microcomputer of the use and so on, and if the DIM pin of LC5710S is held continuously to

the “Low” level,LC5710S continues suspension of a movement. The “Low level” voltage must be lower voltage

than VDIM (OFF). For reverse logic, put one small signal Transistor as the fig8I.

Though LC5710S doesn't have an exclusive

"Remote ON/OFF pin",

But,"Remote ON/OFF function" is as well as

possible by using a DIM pin.

Numéro de pièce similaire - LC5710S

Fabricant	No de pièce	Fiches technique	Description
Seoul Semiconductor	LC571	376Kb / 14P	INFRARED LAMP LED
	LC571	360Kb / 13P	CYAN LAMP LED
	LC571	392Kb / 14P	RED OVAL LAMP LED
	LC571	392Kb / 14P	RED OVAL LAMP LED
	LC571	378Kb / 14P	RED LAMP LED

More results

Description similaire - LC5710S

Fabricant	No de pièce	Fiches technique	Description
Integrated Device Techn...	8312I	234Kb / 18P	CLK input supports the following input types
Xilinx, Inc	DS484	189Kb / 5P	The Split Operation has the following features:
Rohm	BD5243FVE-TR	400Kb / 16P	Delay Time Controlled by external Capacitor, Two output types
Xilinx, Inc	DS804	225Kb / 7P	The following tables list the external slave signals and master
ATMEL Corporation	T48C893	638Kb / 82P	The multiple times programmable (MTP) version for the MARC4 ROM types
RMT Ltd.	1MC10031	260Kb / 3P	The MC10 is powered sub-series of large MC series of TE micro-modules. It consists of the following TEC types
Gamewell-FCI by Honeywe...	FPT-XSTAND	72Kb / 2P	Provides the following
RMT Ltd.	1MC10071	257Kb / 3P	The MC10 is powered sub-series of large MC series of TE micro-modules. It consists of the following TEC types
RMT Ltd.	1MC10049	263Kb / 3P	The MC10 is powered sub-series of large MC series of TE micro-modules. It consists of the following TEC types
Ohmite Mfg. Co.	SINK-S	353Kb / 2P	The heat sink has two types of surface finish

More results

LC5710S Fiches technique(PDF) 11 Page - Sanken electric

LC5710S Fiches technique(HTML) 11 Page - Sanken electric

Numéro de pièce similaire - LC5710S

Description similaire - LC5710S

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Fiches technique Télécharger

Lien URL