XC9116 Series
ETR0407-002
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 such as cellular phones, PDAs and digital cameras. Output voltage of up to 17.5V can be derived, therefore, four
white LEDs in series can be driven. Since an LED current can be set by an external resistor 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 LEDs is controlled by changing the duty cycle of a PWM signal applied to the CE pin. Efficiency is
high with the low feedback reference voltage ensuring the RLED losses are minimal. In addition, an internal MOSFET with an
RDSON of 2.0 Ω is used. A low profile and small board area solution can be achieved using a chip coil and an ultra small
ceramic output capacitor (CL) of 0.22μF as a result of the high 1.0MHz switching frequency.
The 'B' type of XC9116 has an additional fault detection circuit. If the LEDs are disconnected or damaged, excess or run away
output voltage is prevented by stopping the drive of the internal MOSFET.
■APPLICATIONS
■FEATURES
●For White LED drivers
Input Voltage Range
Output Voltage Range
: 2.5V ~ 6.0V
: Up to 17.5V externally set-up
: Reference voltage 0.2V +5%
Oscillation Frequency
: 1.0MHz, ±20%
ON Resistance
: 2.0Ω
Efficiency
: 86% (XC9116B Type)
: 84% (XC9116D Type)
(VIN=3.6V, ILED=20mA when
driving 3 white LEDs in series)
Control
: PWM control
Standby current
: ISTB=1.0μA (MAX.)
Load Capacitor
: 0.22μF, ceramic
Lx Limit Current
: 325mA
Lx Overvoltage Limit
: XC9116B series
No Lx Overvoltage Limit : XC9116D series
Package
: SOT-25 (SOT-23-5), USP-6B
●Mobile phones, PHS
●PDAs
●Digital still cameras
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE
CHARACTERISTICS
●XC9116B Type
SD
XB0ASB03A1B
VIN
L:22uH
VLF3010A
2.5V~6.0V
VIN
CIN
1uF
Lx
CE
100Hz to
10kHz
CL
0.22uF
FB
VSS
R LED
10ohm
20mA
1/23
XC9116 Series
■PIN CONFIGURATION
SOT-25 (TOP VIEW)
6
1
5
2
4
3
*The dissipation pad of the USP-6B package
should be left open. If the circuit needs to
be connected to other pin, it should be
connected to the VSS pin.
USP-6B (BOTTOM VIEW)
■PIN ASSIGNMENT
PIN NUMBER
SOT-25
USP-6B
1
2
3
4
5
-
2
3
1
6
4
5
PIN NAME
FUNCTION
Lx
VSS
FB
CE
VIN
NC
Switch
Ground
Voltage Feedback
Chip Enable
Power Input
No Connection
■CE PIN FUNCTION
CE PIN
OPERATIONAL STATE
H
L
Operation
Shut-down
■PRODUCT CLASSIFICATION
●Ordering Information
XC9116123456
DESIGNATOR
DESCRIPTION
1
Lx Overvoltage Limit
23
4
FB Voltage
02
: 0.2V
Oscillation Frequency
A
: 1MHz
5
Package
M
: SOT-25
D
: USP-6B
6
Device Orientation
R
: Embossed tape, standard feed
L
: Embossed tape, reverse feed
2/23
SYMBOL
DESCRIPTION
B
: Available
D
: Not available
XC9116
Series
■BLOCK DIAGRAMS
●XC9116B02A
VIN
FB
Current
Sense & Limit
Error Amp
-
MAX Duty
Limit
Current
Feedback
+
Phase
0.2V Compensation
CE
CE
Lx Over Voltage
Limit
Lx
+
Buffer Driver
PWM Comparater
VSS
Ramp Wave
Generator, OSC
●XC9116D02A
Current
Sense & Limit
V IN
LX
Error Amp
FB
-
Current
Feedback
+
0.2V
Phase
Compensation
CE
CE
+
Buf f er Driver
PWM Comparater
VSS
Ramp Wave
Generator, OSC
■ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Ta = 25OC
RATINGS
UNITS
VIN Pin Voltage
VIN
VSS – 0.3 ~ 7.0
V
Lx Pin Voltage
VLx
VSS – 0.3 ~ 22.0
V
FB Pin Voltage
VOUT
VSS – 0.3 ~ 7.0
V
CE Pin Voltage
VCE
VSS – 0.3 ~ 7.0
V
Lx Pin Current
ILx
1000
mA
Power Dissipation
SOT-25
USP-6B
Operating Temperature Range
Storage Temperature Range
Pd
Topr
Tstg
250
100
mW
- 40 ~ + 85
O
C
- 55 ~ +125
O
C
3/23
XC9116 Series
■ELECTRICAL CHARACTERISTICS
Ta = 25 OC
XC9116B02AMR
PARAMETER
FB Control Voltage
Output Voltage Range
Input Voltage Range
Supply Current 1
Supply Current 2
Standby Current
Oscillation Frequency
Maximum Duty Cycle (*1)
SYMBOL
VFB
VOUTSET
VIN
IDD1
IDD2
ISTB
FOSC
MAXDTY
Efficiency (*2)
EFFI
Current Limit
ILIM
Lx Overvoltage Limit
VLxOVL
Lx ON Resistance
Lx Leak Current
RSWON
ILxL
CE “High” Voltage
VCEH
CE “Low” Voltage
VCEL
CE “High” Current
CE “Low” Current
FB “High” Current
FB “Low” Current
ICEH
ICEL
IFBH
IFBL
CONDITIONS
FB
VIN=Lx, FB=0.4V
CE=0V, Lx=5.0V
When connected to ext.
components, VIN=3.6V, RLED=20 Ω
When connected to ext. components,
VIN=3.6V
Voltage which Lx pin voltage holding
“H” level VIN > 2.5V
VIN=3.6V, VLx=0.4V
Same as ISTB
CE applied voltage when Lx starts
oscillation
CE applied voltage which Lx pin
voltage holding “H” level
Same as IDD2
Same as ISTB
Same as IDD2
Same as ISTB
MIN.
0.19
VIN
2.5
0.8
86
TYP.
0.20
450
60
0
1.0
92
MAX.
0.21
17.5
6.0
750
140
1.0
1.2
98
UNIT.
V
V
V
μA
μA
μA
MHz
%
CIRCUIT
-
86
-
%
1
225
325
425
mA
4
18.0
19.0
22.0
V
2
-
2.0
0
1.0
Ω
μA
2
3
0.65
-
-
V
2
-
-
0.2
V
2
-0.1
-0.1
-0.1
-0.1
-
0.1
0.1
0.1
0.1
μA
μA
μA
μA
3
3
3
3
1
1
1
2
3
3
2
2
Unless otherwise stated, VIN=3.0V, CE=3.0V, FB=0V, Vpull=5.0V
NOTE: *1: The duty ratio is forcibly reduced when maximum duty cycle periods are repeated.
*2 : LED : NSPW310BS x 3, EFFI = {[(output voltage) x (output current)] / [(input voltage) x (input current)]} x 100
XC9116D02AMR
PARAMETER
FB Control Voltage
Output Voltage Range
Lx Operating
Voltage Range
Operating Voltage Range
Supply Current 1
Supply Current 2
Standby Current
Oscillation Frequency
Maximum Duty Cycle
Efficiency (*1)
EFFI
Current Limit
ILIM
Lx ON Resistance
Lx Leak Current
RSWON
ILxL
CE “High” Voltage
VCEH
CE “Low” Voltage
VCEL
CE “High” Current
CE “Low” Current
FB “High” Current
FB “Low” Current
ICEH
ICEL
IFBH
IFBL
SYMBOL
VFB
VOUTSET
CONDITIONS
FB
MIN.
0.19
VIN
TYP.
0.20
-
MAX.
0.21
19.5
VLx
-
-
20.0
V
1
VIN
IDD1
IDD2
ISTB
FOSC
MAXDTY
2.5
0.8
86
450
50
0
1.0
92
6.0
750
120
1.0
1.2
98
V
μA
μA
μA
MHz
%
1
2
3
3
2
2
-
84
-
%
1
225
325
425
mA
4
-
2.0
0
3.6
1.0
Ω
μA
2
3
0.65
-
-
V
2
-
-
0.2
V
2
-0.1
-0.1
-0.1
-0.1
-
0.1
0.1
0.1
0.1
μA
μA
μA
μA
3
3
3
3
VIN=Lx, VFB=0.4V
VCE=0V, VLx=5V
When connected to ext.
components, VIN=3.6V, RLED=20 Ω
When connected to ext. components,
VIN=3.6V
VIN=3.6V, VLx=0.4V, Rpull=10 Ω
Same as ISTB
CE applied voltage when Lx starts
oscillation
CE applied voltage which Lx pin
voltage holding “H” level
Same as IDD2
Same as ISTB
Same as IDD2
Same as ISTB
Test conditions: Unless otherwise stated, VIN=3.0V, VCE=3.0V, VFB=0V, Vpull=5.0V, Rpull=100 Ω
Notes: *1: LED: NSPW310BS x 3, EFFI = {[(output voltage) x (output current)] / [(input voltage) x (input current)]} x 100
4/23
Ta = 25 OC
UNIT CIRCUIT
V
1
V
1
XC9116
Series
■TYPICAL APPLICATION CIRCUITS
●XC9116B02A
●XC9116D02A
■EXTERNAL COMPONENTS
SYMBOL
L
VALUE
22μH
SBD (*1)
-
CIN
CL (*3)
ZD (*4)
R1
4.7μF
0.22μF
18V
100 Ω
PART NUMBER
VLF3010A-220MR
XB0ASB03A1BR (*2)
MA2Z720
JMK107BJ475MA-B
TMK107BJ224KA-B
MAZ8180
-
MANUFACTURER
TDK
TOREX
PANASONIC
TAIYO YUDEN
TAIYO YUDEN
PANASONIC
-
NOTE :
*1: Please use a Schottky barrier diode (SBD) with a low junction capacitance, Cj.
*2: For using the XB0ASB03A1BR with four white LEDs in series, please be noted with a direct reverse voltage (VR=20V) and a
repetitive peak reverse voltage (VRM=30V).
*3: Use ceramic capacitors processing a low temperature coefficient.
*4: Please refer to the LED Open-circuit Protection at Application Information for setting the Zener diode.
■OPERATIONAL EXPLANATION
The series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase
compensation circuit, Lx overvoltage limit circuit, N-channel MOS driver transistor, current limiter circuit and others. The
series ICs compare, using the error amplifier, the voltage of the internal voltage reference source with the feedback
voltage from the FB pin. Phase compensation is performed on the resulting error amplifier output, to input a signal to the
PWM comparator to determine the turn-on time during switching. The PWM comparator compares, in terms of voltage
level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output
to the N-channel MOS driver transistor to cause the Lx pin to output a switching duty cycle. This process is continuously
performed to ensure stable output voltage. The current feedback circuit detects the N-channel MOS driver transistor's
current for each switching operation, and modulates the error amplifier output signal. This enables a stable feedback
loop even when a low ESR capacitor, such as a ceramic capacitor, is used, ensuring stable output voltage.
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the IC.
<Ramp Wave Circuit>
The ramp wave circuit determines switching frequency. The 1MHz (TYP.) of frequency is fixed internally.
Clock pulses generated in this circuit are used to produce ramp waveforms needed for PWM operation.
<Error Amplifier>
The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the FB pin
voltage. When a voltage lower than the reference voltage is fed back, the output voltage of the error amplifier
increases. Gain and frequency characteristics of the error amplifier output are fixed internally as an optimize signal.
5/23
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 mode and the duty cycle
limit of the next pulse.
1When the driver current is greater than a specific level, the constant-current type current limit function operates to
turn off the pulses from the Lx pin at any given timing.
2The IC controls the next pulse to be smaller than the first pulse.
Current Limit
Current Limit
IL
LX
①
The current w ill be of f w hen the coil current
reaches the value of the constant current limit.
②
Limit some duty pulses af ter the
limit.
<Lx Overvoltage Limit Circuit>
XC9116B series' Lx overvoltage limit circuit monitors the Lx pin voltage. When the Lx pin voltage exceeds than 19V
(TYP.), the IC performs the function of latching the OFF state of the driver transistor, and goes into operation suspension
mode. In suspension mode, operations can be resumed by restoring power to the VIN pin. The suspension mode
does not mean a complete shutdown, but a state in which pulse output is suspended; therefore, the internal circuitry
remains in operation.
<Maximum Duty Cycle Limit>
The XC9116B series' maximum duty cycle limit circuit monitors the duty cycle. When the maximum duty cycle is
repeated for a certain time, the IC controls the error amplifier output so that the duty cycle of the next pulse becomes
smaller than that of the first pulse.
<CE Pin Function>
The operation of the XC9116 series will enter into the shut down mode when a low level signal is input to the CE pin.
During the shut down mode, the supply current is 0μA (TYP.), with high impedance at the Lx pin. The IC starts its
operation with a high level signal to the CE pin. The input to the CE/MODE pin is a CMOS input and the sink current is
0μA (TYP.). 100μs after disable, the IC goes into suspension mode and supply current is minimal. After this, the IC
will be in stand-by mode and the supply current will be 0μA (TYP.).
■NOTES ON USE
<Lx (Pin 1): Switch Pin>
Please connect the anode of a Schottky barrier diode and an inductor to the Lx pin.
<FB (Pin 3): Voltage Feedback Pin>
The reference voltage is 200mV (TYP.). A resistor (RLED) should be connected to the FB pin for setting the cathode of
LEDs and a constant current value. The resistance value can be calculated by the following equation.
RLED=0.2 / ILED
ILED=Setting constant current value
Typical example:
ILED
5mA
10mA
RLED
40 Ω
20 Ω
ILED
13.3mA
20mA
RLED
15 Ω
10 Ω
<CE (Pin 4): Chip Enable Pin>
An ENABLED state is reached when the CE voltage exceeds 0.65V and a DISABLED state when the CE Voltage falls
below 0.2V.
<VIN (Pin 5): Power Supply Pin>
Please connect an inductor and an input by-pass capacitor (CIN) to the VIN pin.
6/23
XC9116
Series
■APPLICATION 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, ILED, when
the diode is on, is determined by RLED. The magnitude is zero when the diode is off. The average of LED current is
proportional to the positive duty ratio of the PWM signal.
The frequency of the PWM signal can be controlled to the optimum value between 100Hz and 10kHz. With regard to the
amplitude of the PWM signal, the high level should be higher than the "H" voltage of CE, VCEH, and the low level, lower
than the "L" voltage of CE, VCEL.
20μs / div
20μs / div
4 series
200μs / div
200μs / div
2. Step-Wise Regulation of LED Current
In some applications, it may be necessary to incorporate step-wise regulation of LED current, ILED. Step-wise regulation
of LED illumination is achieved by connecting a switch element SW1 in parallel with RLED and in series with RLED1 and
turning SW1 on and off, as shown below. Choose a resistance of RLED so that the minimum necessary current is gained
when switch element SW1 is off. The resistance of RLED1 should be such that a desired increase of current passed
through the LED is gained when the switch element is on.
L
SD
VIN
Ex.) Current ILED = 5mA and 15mA
RLED = 200mV / 5mA = 40 Ω
RLED1 = 200mV / (15mA – 5mA) = 20 Ω
ILED
VIN
Lx
CIN
CL
CE
ON/OFF
RLED1
FB
VSS
RLED
SW1
signal
Figure : Circuit using Step-wise Regulation of LED Current
7/23
XC9116 Series
■APPLICATION INFORMATION (Continued)
<Dimming Control (Continued)>
3. Using DC Voltage
If in an 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 and applying a direct-current voltage to R2, as shown below.
When R1>>RLED, ILED which flows into LEDs can be calculated by the following equation;
ILED = (VREF - R1 / R2 (VDC - VREF)) / RLED
VREF = 0.2V (TYP.)
ZD
XC9116
FB
Ex.1) When R1 = 10k Ω, R2 = 100k Ω, RLED = 10 Ω,
In the range of 0.2V to 2.2V DC, ILED
(LED current) varies between 20mA to 0mA.
VDC
(
R2
ILED
)
R1
RLED
Figure : Circuit using DC voltage
Ex.2) When R1 = 10k Ω, R2 = 100k Ω, R3 = 10k Ω,
C1 = 0.1μF, RLED = 10Ω, the average LED current will
be 10mA by inputting a PWM signal of CE ‘H’ level:
2.2V, CE ’L’ level: 0V, duty cycle: 50%, oscillation
frequency: 100Hz. As well as the way of dimming
control by applying the PWM signal to the CE pin, the
average LED current increases proportionally with the
positive duty cycle of the PWM signal.
ZD
XC9116
FB
PWM
R3
(
R2
ILED
)
R1
RLED
C1
Figure : Circuit inputting a PWM signal to the FB pin
<Prevent Emission Caused by White LEDs Leakage>
When the input voltage (VIN) is high, minimum illumination may occur even if the CE pin is in the disable state. If this
happens, please connect a transistor to between the LED and the FB pin. By driving the CE signal in-phase and cutting
the pass to current, the minimum illumination can be prevented.
SD
XB0ASB03A1B
L:22uH
VLF3010A
VIN
3.6V
(3.2V~6.0V)
VIN
CL
0.22uF
(base)
Lx
CIN
4.7uF
XP151A21A2
CE
FB
GND
8/23
RLED
10Ω
20mA
XC9116
Series
■APPLICATION INFORMATION (Continued)
<Illumination of Six in Total White LEDs>
It is possible to illuminate three-series two parallel white LEDs, six in total, using an input voltage VIN≧3.2V.
SD
XB0ASB03A1B
L:22uF
CDRH3D16
VIN
3.2V~6.0V
VIN
CIN:
4.7uF
Lx
CL:
0.22uF
CE
FB
RLED1
10Ω
VSS
RLED1
10Ω
<Use as Flash>
An LED current 65mA (MAX.) can be supplied to two white LEDs.
L
SD
VIN
ILED
VIN
Lx
CIN
CL
RLED1
CE
ON/OFF
FB
VSS
RLED
SW1
signal
<Separate Supply Source of the Step-up Circuit (VIN) from VIN Pin>
Supply source of the step-up circuit can be used separately from VIN pin.
SD
L:22uF
VLF3010A XB0ASB03A1B
L:22uF
SD
VLF3010A XB0ASB03A1B
VIN
1.7V~
VIN
1.4V~
3.0V
CIN
4.7uF
3.0V
CDD
4.7uF
Lx
VIN
CL
0.22uF
FB
CE
VSS
CIN
4.7uF
CDD
4.7uF
Lx
VIN
FB
CE
RLED
20Ω
10mA
Circuit example of separating supply source of
the step-up circuit from VIN pin ( 3 LEDs)
CL
0.22uF
VSS
RLED
20Ω
10mA
Circuit example of separating supply source of
the step-up circuit from VIN pin ( 2 LEDs)
Note: Please input 2.5V~6V to the VIN pin when you use.
9/23
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 Lx pin voltage to exceed the absolute
maximum rating of 22V.
In the case of the B type products, 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. However, the detector may detect an overvoltage if
the Lx pin voltage exceeds 18V, which is the overvoltage limit, even when no LEDs are open. Therefore, care must be
taken if four LEDs each having a forward voltage of 4.45V or more are connected in series.
In the case of the D type products (no overvoltage limit circuit), a Zener diode (ZD) and a resistor (R1) can be externally
connected to serve as a load in the case that LEDs are opened, preventing the increase of the Lx pin voltage. The ZD
voltage should be set to no more than 20V and no less than the product of each white LED’s maximum forward voltage
multiplied by the number of the connected LEDs, so that the Zener diode will not load the LEDs during normal operation.
If the Zener diode becomes load, the current that runs through the white LEDs is reduced, decreasing illumination.
SBD
XB0ASB03A1B
L:22uF
VLF3010A
VIN
2.5V~6.0V
ZD
MAZ8180
CIN
4.7uF
VIN
Lx
CL
0.22uF
R1
100Ω
CE
FB
VSS
R LED
10Ω
20mA
Note : The XC9116B02A series requires neither the Zener diode (ZD) nor the resistor 1 (R1).
<Startup Inrush Current>
The XC9116 series has no soft-start circuit built-in in order to minimize delay at startup. The inrush current can reach up
to the current limit, ILIM.
In some cases, overshoot can occur.
10/23
XC9116
Series
■APPLICATION INFORMATION (Continued)
<Instruction on Pattern Layout>
1. In order to stabilize VIN's voltage level, we recommend that an input by-pass capacitor (CIN) be connected as close as
possible to the VIN & VSS pins.
2. Please mount each external component as close to the IC as possible.
3. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit
impedance.
4. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground
currents at the time of switching may result in instability of the IC.
●XC9116B Series Pattern Layout (SOT-25)
LED
RLED
CE
3
1
V OUT
2
4
GND
5
CL
VIN
SBD
L
●XC9116D Series Pattern Layout (SOT-25)
LED
RLED
ZD
CE
R1
3
1
V OUT
2
4
GND
5
CL
VIN
SBD
L
11/23
XC9116 Series
■ TEST CIRCUITS
●Circuit ①
●Circuit ①
XC9116B02A series
●Circuit ②
XC9116D02A series
●Circuit ③
OSC
Rpull
A
V IN
Lx
CE
V IN
A
220uF
FB
VSS
1uF
A
Vpull
V CE
VIN
VIN
CE
FB
A
V SS
1uF
VFB
Lx
VCE
A
VLx
VFB
●Circuit ④
OSC
10ohm
300ohm
1uF
V IN
VIN
Lx
CE
FB
Vpull
220uF
V SS
1.1kohm
1uF
VCE
4.4V
11kohm
2SK583
V
0.01uF
1. The measurement method of LX ON Resistance RSWON
Using the circuit ②, Lx ON resistance can be measured by adjusting Vpull voltage to set Lx voltage VLx 0.4V when the
driver transistor is ON.
The oscilloscope is used for measuring the Lx voltage when the driver transistor is ON.
RSWON = 0.4 / ((Vpull - 0.4) /10)
2. The measurement method of current limit ILIM
Using the circuit ④, current limit ILIM can be calculated by the equation including Vpull voltage when FB voltage is
decreased while Vpull voltage is adjusted and Lx voltage VLx when the driver transistor is ON.
The oscilloscope is used for measuring the Lx voltage when the driver transistor is ON.
ILIM = (Vpull - VLx) / Rpull
12/23
XC9116
Series
■ TYPICAL PERFORMANCE CHARACTERISTICS
(1) Supply Current 1 vs. Input Voltage
VCE=3.0V,VFB=0V
Vpull=5V,Rpull=100ohm
VIN=Lx,VCE=3.0V,VFB=0.4V
140
Supply Current2 IDD2 (uA)
1200
Supply Current 1 IDD1 (uA)
(2) Supply Current 2 vs. Input Voltage
1000
o
Ta=25 C
800
600
85oC
400
-40oC
200
0
120
100
Ta=25oC
o
85 C
80
60
40
-40oC
20
0
2
3
4
5
6
2
3
Input Voltage VIN (V)
Maxmum Duty Cycle MAXDTY(%)
Oscillation Frequency Fosc (MHz)
1.3
o
85 C
1.1
o
Ta= 25 C
0.9
-40oC
0.8
0.7
0.6
2
3
4
5
VCE=3.0V,VFB=0V
Vpull=5V,Rpull=100ohm
98
96
-40oC
94
92
85oC
90
Ta=25oC
88
86
2
6
3
(5) Stand-by Current vs. Input Voltage
VCE=0V,VFB=0V,VLx=5V
Max LED Current ILED_MAX(mA)
Standby Current ISTB (uA)
0.8
0.6
0.4
o
o
Ta=25 C,-40 C
0.2
0.0
2
3
4
5
6
(6) Maximum LED Current vs. Input Voltage
1.0
o
4
Input Voltage VIN (V)
Input Voltage VIN (V)
85 C
6
(4) Maximum Duty Cycle vs. Input Voltage
VCE=3.0V,VFB=0V
Vpull=5V,Rpull=100ohm
1.0
5
Input Voltage VIN (V)
(3) Oscillation Frequency vs. Input Voltage
1.2
4
5
Input Voltage VIN (V)
6
VCE=3.0V,LED:NSPW310BS
L=22uH(VLF3010),CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
250
Ta=25oC
200
10V
150
VOUT=7V
100
16V
50
13V
0
2
3
4
5
6
Input Voltage VIN(V)
13/23
XC9116 Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(8) Current Limit vs. Input Voltage
VCE=3.0V,VLx=0.4V,Rpull=10ohm,Tr:2SK583
6.0
5.0
4.0
o
o
-40 C
Ta=25 C
3.0
2.0
1.0
VCE=3.0V,VLx=0.4V,Rpull=10ohm,Tr:2SK583
700
Current Limit ILIM (mA)
Ω
Lx
SWON (ohm)
LxON
ONResistance
ResistanceR Rswon
( )
(7) Lx On Resistance vs. Input Voltage
85oC
0.0
600
-40oC
500
400
300
85oC
200
Ta=25oC
100
0
2
3
4
5
6
2
3
Input Voltage VIN (V)
0.200
0.195
0.190
0
25
50
75
100
Lx Voltage
Over Voltage
Limit
VLxOVL(V)
Lx Over
Limit
VLxOVL
(V)
Feed Back Voltage VFB(V)
VCE=3.0V,VFB=0V,Rpull=300ohm
0.205
-25
22
21
20
Ta=25oC
19
-40oC,85oC
18
2
Ambient Temperature Ta (OC)
5
6
VFB=0V,Vpull=5V,Rpull=100ohm
0.65
0.60
-40oC
0.55
CE 'L' Voltage VCEL(V)
CE 'H' Voltage VCEH(V)
4
(12) CE ’L’ Voltage vs. Input Voltage
VFB=0V,Vpull=5V,Rpull=100ohm
0.60
0.50
85oC
0.45
0.40
Ta=25oC
0.35
0.30
0.25
0.55
-40oC
0.50
0.45
0.40
85oC
0.35
Ta=25oC
0.30
0.25
0.20
0.20
2
3
4
5
Input Voltage VIN (V)
14/23
3
Input Voltage VIN(V)
(11) CE ’H’ Voltage vs. Input Voltage
0.65
6
(10) Lx Overvoltage Limit vs. Input Voltage
VCE=3.0V,LED:NSPW310BS
L=22uH(VLF3010),CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
-50
5
Input Voltage VIN (V)
(9) FB Voltage vs. Ambient Temperature
0.210
4
6
2
3
4
5
Input Voltage VIN (V)
6
XC9116
Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(13) Efficiency vs. Input Voltage
XC9116B02AMR, 3 LEDs in series
L=22uH(VLF3010)
L=10uH(VLF3010)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
30mA
90
Efficiency EFFI(%)
Efficiency EFFI (%)
30mA
80
20mA
70
ILED=10mA
60
90
80
70
20mA
ILED=10mA
60
Ta=25oC
Ta=25oC
50
50
2
3
4
5
6
2
3
Input Voltage VIN (V)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
30mA
90
Efficiency EFFI(%)
Efficiency EFFI(%)
30mA
80
20mA
ILED=10mA
ILED=10m
A
60
90
80
20mA
ILED=10mA
70
60
Ta=25oC
Ta=25oC
50
50
2
3
4
5
6
2
3
Input Voltage VIN(V)
90
6
80
ILED=10mA
20mA
60
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
Efficiency EFFI(%)
30mA
70
5
L=10uH(CBC2518)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
4
Input Voltage VIN(V)
L=22uH(CBC2518)
Efficiency EFFI(%)
6
L=10uH(CDRH3D16)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
70
5
Input Voltage VIN(V)
L=22uH(CDRH3D16)
100
4
90
20mA
30mA
80
70
60
ILED=10mA
Ta=25oC
50
Ta=25oC
50
2
3
4
5
Input Voltage VIN(V)
6
2
3
4
5
6
Input Voltage VIN(V)
15/23
XC9116 Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(13) Efficiency vs. Input Voltage (Continued)
XC9116B02AMR, 4 LEDs in series
L=22uH(VLF3010)
L=10uH(VLF3010)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
30mA
Efficiency EFFI(%)
Efficiency EFFI (%)
20mA
90
80
70
ILED=10mA
30mA
60
90
80
20mA
ILED=10mA
70
60
Ta=25oC
Ta=25oC
50
50
2
3
4
5
6
2
5
Input Voltage VIN(V)
L=22uH(CDRH3D16)
L=10uH(CDRH3D16)
6
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
30mA
30mA
90
Efficiency EFFI(%)
Efficiency EFFI(%)
4
Input Voltage VIN (V)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
3
80
ILED=10mA
20mA
70
60
90
80
ILED=10mA
20mA
70
60
Ta=25oC
Ta=25oC
50
50
2
3
4
5
6
2
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
L=22uH(CBC2518)
L=10uH(CBC2518)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
3
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
90
Efficiency EFFI(%)
Efficiency EFFI(%)
Ta=25oC
30mA
80
70
20mA
60
ILED=10mA
90
20mA
80
70
60
Ta=25oC
ILED=10mA
50
50
2
3
4
5
Input Voltage VIN(V)
16/23
30mA
6
2
3
4
5
Input Voltage VIN(V)
6
XC9116
Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(13) Efficiency vs. Input Voltage (Continued)
XC9116B02AMR, 2 parallel legs with 3 LEDs per leg
L=22uH(VLF3010)
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
Efficiency EFFI (%)
ILED=10mA
90
80
70
30mA
60
20mA
Ta=25oC
50
2
3
4
5
6
Input Voltage VIN (V)
(14) Efficiency vs. LED Current
XC9116B02AMR, 3 LEDs in series
L=22uH
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
90
80
70
60
50
40
30
20
10
0
L:CDRH3D16
Efficiency EFFI(%)
Efficiency EFFI(%)
L=10uH
CBC2518
VLF3010A
VIN=3.6V
0
5
10
15
20
25
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
90
80
70
60
50
40
30
20
10
0
30
L:CDRH3D16
CBC2518
VLF3010A
VIN=3.6V
0
5
LED Current ILED(mA)
10
15
20
25
30
LED Current ILED(mA)
XC9116B02AMR, 4 LEDs in series
L=22uH
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
VCE=3.0V
LED:NSPW310BS,CIN=4.7uF(Ceramic)
CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
100
90
80
70
60
50
40
30
20
10
0
L:CDRH3D16
Efficiency EFFI(%)
Efficiency EFFI(%)
L=10uH
CBC2518
VLF3010A
VIN=3.6V
0
5
10
15
20
LED Current ILED(mA)
25
30
100
90
80
70
60
50
40
30
20
10
0
L:CDRH3D16
CBC2518
VLF3010A
VIN=3.6V
0
5
10
15
20
25
30
LED Current ILED(mA)
17/23
XC9116 Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(15) Average LED Current vs. Input Voltage
CE CLK=1kHz,4 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
25
20
100%
15
Dimming PWM Duty=50%
10
Ta= 85oC
25oC
-40oC
5
0
2.5
3.0
3.5
4.0
4.5
Average LED Current ILED_ave (mA)
Average LED Current ILED_ave(mA)
CE CLK=100Hz,4 LEDs in series
5.0
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
25
20
100%
15
Dimming PWM Duty=50%
10
Ta= 85oC
25oC
-40oC
5
0
2.5
3.0
CE CLK=10kHz,4 LEDs in series
20
100%
15
Dimming PWM Duty=50%
10
Ta= 85oC
25oC
-40oC
3.5
4.0
4.5
5.0
25
20
100%
15
Dimming PWM Duty=50%
10
Ta= 85oC
25oC
-40oC
5
0
2.5
3.0
Input Voltage VIN (V)
100%
15
Dimming PWM Duty=50%
10
Ta= 85oC
25oC
-40oC
3.0
3.5
4.0
Input Voltage VIN (V)
4.5
5.0
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
20
0
2.5
4.0
4.5
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
25
20
100%
15
Dimming PWM Duty=50%
10
Ta= 85oC
25oC
-40oC
5
0
2.5
3.0
3.5
4.0
4.5
Input Voltage VIN (V)
Note : Average LED Current denotes the average current which flows into LED when a PWM signal is input to the CE pin.
18/23
5.0
CE CLK=10kHz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
5
3.5
Input Voltage VIN (V)
CE CLK=1kHz,3 LEDs in series
25
5.0
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
25
3.0
4.5
CE CLK=100Hz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
0
2.5
4.0
Input Voltage VIN (V)
Input Voltage VIN (V)
5
3.5
5.0
XC9116
Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(16) Average LED Current vs. Dimming PWM Duty
CE CLK=1kHz,4 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
20
Average LED Current ILED_ave (mA)
Average LED Current ILED_ave(mA)
CE CLK=100Hz,4 LEDs in series
VIN=2.5V
2.7V
3.2V
4.2V
5.0V
16
12
8
4
Ta=25oC
0
20
VIN=2.5V
2.7V
3.2V
4.2V
5.0V
16
12
8
4
0
0
20
40
60
80
100
0
20
40
CE CLK=10kHz,4 LEDs in series
VIN=2.5V
2.7V
3.2V
4.2V
5.0V
8
4
Ta=25oC
0
20
40
60
80
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
20
0
20
VIN=2.5V
2.7V
3.2V
4.2V
5.0V
16
12
8
4
Ta=25oC
0
0
100
20
CE CLK=1kHz,3 LEDs in series
VIN=2.5V
2.7V
3.2V
4.2V
5.0V
8
4
Ta=25oC
0
20
40
60
80
Dimming PWM Duty (%)
80
100
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
20
0
60
CE CLK=10kHz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
12
40
Dimming PWM Duty (%)
Dimming PWM Duty (%)
16
100
CE CLK=100Hz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic)
R1=10ohm,SBD:XB0ASB03A1B
12
80
Dimming PWM DUTY (%)
Dimming PWM DUTY (%)
16
60
100
20
VIN=2.5V
2.7V
3.2V
4.2V
5.0V
16
12
8
4
Ta=25oC
0
0
20
40
60
80
100
Dimming PWM Duty (%)
Note : Average LED Current denotes the average current which flows into LED when an PWM signal is input to the CE pin.
19/23
XC9116 Series
■PACKAGING INFORMATION
●SOT-25 (SOT-23-5)
●USP-6B
* Pin no. 1 is thicker than other pins.
20/23
XC9116
Series
■PACKAGING INFORMATION (Continued)
●USP-6B Recommended Pattern Layout
●USP-6B Recommended Metal Mask Design
21/23
XC9116 Series
■ MARKING RULE
●SOT-25
1 Represents product series
MARK
PRODUCT SERIES
XC9116 x 02AM x
F
* Character inversion used.
SOT-25
(TOP VIEW)
2 Represents Lx overvoltage limit
MARK
Lx OVERVOLTAGE LIMIT
PRODUCT SERIES
B
D
Available
Not Available
XC9116B02AM x
XC9116D02AM x
MARK
OSCILLATION FREQUENCY
PRODUCT SERIES
A
1MHz
XC9116 x 02AM x
3 Represents oscillation frequency
4 Represents production lot number
0 to 9 and A to Z, or inverted characters 0 to 9 and A to Z repeated.
(G, I, J, O, Q, W excepted)
●USP-6B
1 Represents product series
MARK
PRODUCT SERIES
K
XC9116 x 02AD x
2 Represents Lx overvoltage limit
USP-6B
(TOP VIEW)
MARK
Lx OVERVOLTAGE LIMIT
PRODUCT SERIES
B
D
Available
Not Available
XC9116B02AD x
XC9116D02AD x
FB VOLTAGE (V)
PRODUCT SERIES
0.2
XC9116 x 02AD x
MARK
OSCILLATION FREQUENCY
PRODUCT SERIES
A
1MHz
XC9116 x 02AD x
34 Represents FB voltage
MARK
③
④
0
2
5 Represents oscillation frequency
6 Represents production lot number
0 to 9 and A to Z repeated (G, I, J, O, Q, W excepted)
* No character inversion used.
22/23
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 is up to date.
2. We assume no responsibility for any infringement of patents, patent rights, or other
rights arising from the use of any information and circuitry in this catalog.
3. Please ensure suitable shipping controls (including fail-safe designs and aging
protection) are in force for equipment employing products listed in this catalog.
4. The products in this catalog are not developed, designed, or approved for use with such
equipment whose failure of malfunction can be reasonably expected to directly
endanger the life of, or cause significant injury to, the user.
(e.g. Atomic energy; aerospace; transport; combustion and associated safety
equipment thereof.)
5. Please use the products listed in this catalog within the specified ranges.
Should you wish to use the products under conditions exceeding the specifications,
please consult us or our representatives.
6. We assume no responsibility for damage or loss due to abnormal use.
7. All rights reserved. No part of this catalog may be copied or reproduced without the
prior permission of Torex Semiconductor Ltd.
23/23