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XC9133 Datasheet Preview

XC9133 Datasheet

Step-Up DC/DC Converter-LED Backlight Driver

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XC9133 Series
Step-Up DC/DC Converter-LED Backlight Driver
ETR0413-005a
GENERAL DESCRIPTION
The XC9133 series is a fixed frequency, constant current step-up DC/DC converter which is optimized for LED backlight
applications in mobile phones, PDAs and digital cameras. Output voltage of up to 17.5V is possible so that four white LEDs
can be driven in series. Since the LED current is set by only one external resistor, all white LEDs placed in series can be
turned on at the same time. The new DC/DC Converter is also able to drive a network of two parallel banks of three LEDs.
LED dimming is controlled by adjusting the duty cycle of a PWM signal (10kHz Max.) applied to the CE pin.
Efficiency is high with a 0.2V low feedback reference voltage ensuring the RLED losses are minimal. In addition, an internal
MOSFET with a low RDSON of 2.4Ω is used. A low profile and small board area solution can be achieved using a chip
inductor and a small ceramic output capacitor CL=0.22μF as a result of the high 1MHz switching frequency.
If white LEDs are opened or damaged, the detector built in the Lx pin causes the IC to stop oscillating, preventing excessive
increase of the output voltage.
APPLICATIONS
For White LED drivers
Smart phones / Mobile phones
Mobile devices / terminals
Digital still cameras
FEATURES
Input Voltage Range : 2.5V ~ 6.0V
Output Voltage Range : Up to 17.5V externally set-up
Reference voltage 0.2V +5%
Oscillation Frequency : 1.0MHz±20%
ON Resistance
: 2.4Ω
High Efficiency
: 85%
3 white LEDs in series
Control
VIN=3.6V, ILED=20mA
: PWM control
Stand-by Current
Output Capacitor
: ISTB=1.0μA (MAX.)
: 0.22μF, ceramic
Lx Limit Current
: 360mATYP.
Lx Overvoltage Limit : 19V (TYP.)
Operating Ambient Temperature : -40℃~+85
Packages
: SOT-25
Environmentally Friendly : EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE
CHARACTERISTICS
XC9133B02A Series
100
90
80
70
60
50
40
30
20
10
0
0
LVLF3010S
5
LEDNSCW100 x 3
SBDXBS053V15R,CLTMK316J224KF
NR3015
VIN=3.0V
10
15
20
25
30
LED Currrent : ILED (mA)
1/15




Torex

XC9133 Datasheet Preview

XC9133 Datasheet

Step-Up DC/DC Converter-LED Backlight Driver

No Preview Available !

XC9133 Series
PIN CONFIGURATION
SOT-25 (TOP VIEW)
PIN ASSIGNMENT
PIN NUMBER
SOT-25
1
2
3
4
5
PIN NAME
Lx
VSS
FB
CE
VIN
CE PIN FUNCTION
CE PIN
H
L
FUNCTIONS
Switch
Ground
Voltage Feedback
Chip Enable
Power Input
OPERATIONAL STATE
Operation
Shut-down
PRODUCT CLASSIFICATION
Ordering Information
XC9133①②③④⑤⑥-
DESIGNATOR
ITEM
SYMBOL
DESCRIPTION
Lx Overvoltage Limit
B
Available
②③
FB Voltage
02
0.2V
Oscillation Frequency
A
1MHz
⑤⑥-⑦(*1)
Package (Order Unit)
MR
MR-G
SOT-25 (3,000pcs/Reel)
SOT-25 (3,000pcs/Reel)
(*1) The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2/15



Part Number XC9133
Description Step-Up DC/DC Converter-LED Backlight Driver
Maker Torex
Total Page 3 Pages
PDF Download

XC9133 Datasheet PDF





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