XC9116B02ADL TOREX [Torex Semiconductor], XC9116B02ADL Datasheet

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XC9116B02ADL

Manufacturer Part Number
XC9116B02ADL
Description
Step-Up DC/DC Converter-Backlight LED Driver
Manufacturer
TOREX [Torex Semiconductor]
Datasheet
XC9116
Step-Up DC/DC Converter-Backlight LED Driver
■GENERAL DESCRIPTION
The XC9116 series is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting
applications on cellular phones, PDAs and digital cameras etc. Output voltage of up to 17.5V can be derived, therefore, four
white LED’s in series can be driven. Since an LED current can be set up by an external resistance when LEDs are in-series
connection, all white LEDs can be turned on equably. A network of two parallel legs with three in each LED can be also
driven. Luminance of the LED's is controlled by changing the duty cycle of a PWM signal applied to the CE pin. Efficiency is
high with the XC9116 through the high 1.0MHz switching frequency and the low feedback reference voltage, ensuring the R
losses are minimal. In addition, an internal MOSFET with an R
solution can be achieved using a chip coil and an ultra small ceramic output capacitor (C
The 'B' type of XC9116 has an additional fault detection circuit. If the LEDs are disconnected or damaged in such a way that
prevents feedback, excess or run away output voltage is prevented by stopping the drive to the internal MOSFET.
■APPLICATIONS
2.5V~6.0V
■TYPICAL APPLICATION CIRCUIT
●For White LED drivers
VIN
○Mobile phones, PHS
○PDAs
○Digital still cameras
CIN
1uF
100Hz to
10kHz
VIN
CE
VLF3010A
L:22uH
Series
VSS
FB
Lx
XB0ASB03A1B
10ohm
SD
R
LED
20mA
0.22uF
DSON
CL
■TYPICAL PERFORMANCE
●XC9116B Type
of 2.0 Ω is used. A low profile and small board area
■FEATURES
Input Voltage Range
Output Voltage Range
Oscillation Frequency
ON Resistance
Efficiency
Control
Standby current
Load Capacitor
Lx Limit Current
Lx Overvoltage Limit
No Lx Overvoltage Limit : XC9116D series
CHARACTERISTICS
L
) of 0.22µF.
: 2.5V ~ 6.0V
: Up to 17.5V externally set-up
: Reference voltage 0.2V +5%
: 1.0MHz, ±20%
: 2.0Ω
: 86% (XC9116B Type)
: 84% (XC9116D Type)
: PWM control
: ISTB=1.0µA (MAX.)
: 0.22µF, ceramic
: 325mA
: XC9116B series
driving 3 white LEDs in series)
(V
IN
=3.6V, I
LED
ETR0407-002
=20mA when
1/22
LED

Related parts for XC9116B02ADL

XC9116B02ADL Summary of contents

Page 1

XC9116 Series Step-Up DC/DC Converter-Backlight LED Driver ■GENERAL DESCRIPTION The XC9116 series is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting applications on cellular phones, PDAs and digital cameras etc. Output voltage of ...

Page 2

XC9116 Series ■PIN CONFIGURATION SOT-25 (TOP VIEW) ■PIN ASSIGNMENT PIN NUMBER SOT-25 USP- ■CE PIN FUNCTION CE PIN H L ■PRODUCT CLASSIFICATION ●Ordering Information XC9116123456 DESIGNATOR DESCRIPTION 1 ...

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DIAGRAMS ●XC9116B02A VIN Error Amp 0.2V Compensation CE ●XC9116D02A V IN Error Amp Compensation 0. ■ ABSOLUTE MAXIMUM RATINGS PARAMETER V Pin Voltage IN Lx Pin Voltage FB Pin Voltage CE ...

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XC9116 Series ■ELECTRICAL CHARACTERISTICS XC9116B02AMR PARAMETER SYMBOL FB Control Voltage V FB Output Voltage Range V OUTSET Input Voltage Range V IN Supply Current 1 I DD1 Supply Current 2 I DD2 Standby Current ISTB Oscillation Frequency FOSC Maximum Duty ...

Page 5

APPLICATION CIRCUITS ●XC9116B02A ■EXTERNAL COMPONENTS SYMBOL VALUE L 22µH SBD (* 4.7µ (*3) 0.22µF ZD (*4) 18V 100 Ω R1 NOTE : *1: Please use a Schottky barrier diode (SBD) with a low junction capacitance, ...

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XC9116 Series ■OPERATIONAL EXPLANATIONS (Continued) <Current Limit> The current limit circuit of the XC9116 series monitors the current flowing through the N-channel MOS driver transistor connected to the Lx pin, and features a combination of the constant-current type current limit ...

Page 7

INFORMATION <Dimming Control> 1. Applying PWM signal to the CE pin The XC9116 repeats on/off operations by a PWM signal applied to the CE pin. The magnitude of LED current, I the diode is on, is determined by R ...

Page 8

XC9116 Series ■APPLICATION INFORMATION (Continued) <Dimming Control (Continued)> 3. Using DC Voltage application it is necessary to control the LED current by a variable DC voltage, illumination control of LED is achieved by connecting R1 and R2 ...

Page 9

INFORMATION (Continued) <Illumination of Six in Total White LEDs> possible to illuminate three-series two parallel white LEDs, six in total, using an input voltage V VIN 3.2V~6.0V CIN: 4.7uF <Use as Flash> An LED current 65mA (MAX.) ...

Page 10

XC9116 Series ■APPLICATION INFORMATION (Continued) <LED Open-circuit Protection> If white LEDs are opened or damaged, the FB pin is pulled down, so that the operating duty ratio reaches the maximum. Accordingly, the output voltage continues to increase, possibly causing the ...

Page 11

INFORMATION (Continued) <Instruction on Pattern Layout> order to stabilize V 's voltage level, we recommend that an input by-pass capacitor (C IN possible to the V & V pins Please mount each external component ...

Page 12

XC9116 Series ■ TEST CIRCUITS ●Circuit ① XC9116B02A series ●Circuit ② 1uF V CE ●Circuit ④ OSC 1uF VCE 1. The measurement method of LX ...

Page 13

TYPICAL PERFORMANCE CHARACTERISTICS (1) Supply Current 1 vs. Input Voltage Vpull=5V,Rpull=100ohm 1200 1000 o Ta=25 800 600 400 200 Input Voltage   VIN   (V) (3) Oscillation Frequency vs. Input Voltage Vpull=5V,Rpull=100ohm ...

Page 14

XC9116 Series ■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued) ( Resistance vs. Input Voltage VCE=3.0V,VLx=0.4V,Rpull=10ohm,Tr:2SK583 6.0 5.0 4.0 o -40 C Ta=25 3.0 2 Input Voltage VIN (V) (9) FB Voltage vs. Ambient ...

Page 15

TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (13) Efficiency vs. Input Voltage XC9116B02AMR, 3 LEDs in series L=22uH(VLF3010) LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 100 30mA Input Voltage VIN (V) L=22uH(CDRH3D16) LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 100 90 80 ILED=10m ...

Page 16

XC9116 Series ■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (13) Efficiency vs. Input Voltage (Continued) XC9116B02AMR, 4 LEDs in series L=22uH(VLF3010) LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 100 20mA 30mA Input Voltage VIN (V) L=22uH(CDRH3D16) LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B ...

Page 17

TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (13) Efficiency vs. Input Voltage (Continued) XC9116B02AMR, 2 parallel legs with 3 LEDs per leg L=22uH(VLF3010) LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 100 ILED=10mA 20mA Input Voltage VIN (V) (14) Efficiency ...

Page 18

XC9116 Series ■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (15) Average LED Current vs. Input Voltage CE CLK=100Hz,4 LEDs in series L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B Dimming PWM Duty=50 2.5 3.0 3.5 Input Voltage VIN (V) CE CLK=10kHz,4 LEDs ...

Page 19

TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (16) Average LED Current vs. Dimming PWM Duty CE CLK=100Hz,4 LEDs in series L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B 20   VIN=2.5V   2.7V 16   3.2V    4.2V 12    5. Dimming ...

Page 20

XC9116 Series ■PACKAGING INFORMATION ●SOT-25 (SOT-23-5) ●USP-6B 20/22 * Pin no thicker than other pins. ...

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MARKING RULE ●SOT-25 1 Represents product series * Character inversion used. 2 Represents Lx overvoltage limit SOT-25 (TOP VIEW) 3 Represents oscillation frequency 4 Represents production lot number and inverted characters 0 ...

Page 22

XC9116 Series 1. The products and product specifications contained herein are subject to change without notice to improve performance characteristics. Consult us, or our representatives before use, to confirm that the information in this catalog date. 2. ...

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