XC9116 Series
Step-Up DC/DC Converter-Backlight LED Driver
ETR0407-002
■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
●For White LED drivers ●Mobile phones, PHS ●PDAs ●Digital still cameras
■FEATURES
: 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 Input Voltage Range Output Voltage Range
■TYPICAL APPLICATION CIRCUIT
SD XB0ASB03A1B VIN 2.5V~6.0V L:22uH VLF3010A V IN Lx
■TYPICAL PERFORMANCE CHARACTERISTICS
●XC9116B Type
CIN 1uF
CL 0.22uF
CE
100Hz to 10kHz
FB VSS R LED 10ohm 20mA
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XC9116 Series
■PIN CONFIGURATION
6 5 4
1 2 3
SOT-25 (TOP VIEW)
*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 Lx VSS FB CE VIN NC FUNCTION Switch Ground Voltage Feedback Chip Enable Power Input No Connection
■CE PIN FUNCTION
CE PIN H L OPERATIONAL STATE Operation Shut-down
■PRODUCT CLASSIFICATION
●Ordering Information
XC9116123456 DESIGNATOR DESCRIPTION Lx Overvoltage Limit FB Voltage Oscillation Frequency Package Device Orientation SYMBOL B D 02 A M D R L : Available : Not available : 0.2V : 1MHz : SOT-25 : USP-6B : Embossed tape, standard feed : Embossed tape, reverse feed DESCRIPTION
1 23 4 5 6
2/23
XC9116
Series
■BLOCK DIAGRAMS
●XC9116B02A
Current Sense & Limit Error Amp + Current Feedback + PWM Comparater VSS Buffer Driver MAX Duty Limit Lx Over Voltage Limit Lx
VIN FB
Phase 0.2V Compensation CE CE
Ramp Wave Generator, OSC
●XC9116D02A
V IN Error Amp FB + 0.2V CE Current Feedback Phase Compensation CE + PWM Comparater
Current Sense & Limit LX
Buf f er Driver
Ramp Wave Generator, OSC
VSS
■ ABSOLUTE MAXIMUM RATINGS
PARAMETER VIN Pin Voltage Lx Pin Voltage FB Pin Voltage CE Pin Voltage Lx Pin Current Power Dissipation SOT-25 USP-6B SYMBOL VIN VLx VOUT VCE ILx Pd Topr Tstg RATINGS VSS – 0.3 ~ 7.0 VSS – 0.3 ~ 22.0 VSS – 0.3 ~ 7.0 VSS – 0.3 ~ 7.0 1000 250 100 - 40 ~ + 85 - 55 ~ +125
Ta = 25OC UNITS V V V V mA mW
O O
Operating Temperature Range Storage Temperature Range
C C
3/23
XC9116 Series
■ELECTRICAL CHARACTERISTICS
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) Efficiency (*2) Current Limit Lx Overvoltage Limit Lx ON Resistance Lx Leak Current CE “High” Voltage CE “Low” Voltage CE “High” Current CE “Low” Current FB “High” Current FB “Low” Current Ta = 25 OC SYMBOL VFB VOUTSET VIN IDD1 IDD2 ISTB FOSC MAXDTY EFFI ILIM VLxOVL RSWON ILxL VCEH VCEL ICEH ICEL IFBH IFBL CONDITIONS FB MIN. 0.19 VIN 2.5 0.8 86 225 18.0 0.65 -0.1 -0.1 -0.1 -0.1 TYP. 0.20 450 60 0 1.0 92 86 325 19.0 2.0 0 MAX. 0.21 17.5 6.0 750 140 1.0 1.2 98 425 22.0 1.0 0.2 0.1 0.1 0.1 0.1 UNIT. V V V μA μA μA MHz % % mA V Ω μA V V μA μA μA μA
CIRCUIT
VIN=Lx, FB=0.4V CE=0V, Lx=5.0V
1 1 1 2 3 3 2 2 1 4 2 2 3 2 2 3 3 3 3
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
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) Current Limit Lx ON Resistance Lx Leak Current CE “High” Voltage CE “Low” Voltage CE “High” Current CE “Low” Current FB “High” Current FB “Low” Current
SYMBOL VFB VOUTSET VLx VIN IDD1 IDD2 ISTB FOSC MAXDTY EFFI ILIM RSWON ILxL VCEH VCEL ICEH ICEL IFBH IFBL
CONDITIONS FB
MIN. 0.19 VIN 2.5 0.8 86 225 0.65 -0.1 -0.1 -0.1 -0.1
TYP. 0.20 450 50 0 1.0 92 84 325 2.0 0 -
MAX. 0.21 19.5 20.0 6.0 750 120 1.0 1.2 98 425 3.6 1.0 0.2 0.1 0.1 0.1 0.1
Ta = 25 OC UNIT CIRCUIT V 1 V 1 V V μA μA μA MHz % % mA Ω μA V V μA μA μA μA 1 1 2 3 3 2 2 1 4 2 3 2 2 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
XC9116
Series
■TYPICAL APPLICATION CIRCUITS
●XC9116B02A ●XC9116D02A
■EXTERNAL COMPONENTS
SYMBOL L SBD (*1) CIN CL (*3) ZD (*4) R1
NOTE :
VALUE 22μH 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 -
*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. The reference voltage source provides the reference voltage to ensure stable output voltage of the IC. 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. 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)
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.
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. 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. 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
Please connect the anode of a Schottky barrier diode and an inductor to the Lx 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
An ENABLED state is reached when the CE voltage exceeds 0.65V and a DISABLED state when the CE Voltage falls below 0.2V. Please connect an inductor and an input by-pass capacitor (CIN) to the VIN pin.
6/23
XC9116
Series
■APPLICATION INFORMATION
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 VIN SD
Ex.) Current ILED = 5mA and 15mA RLED = 200mV / 5mA = 40 Ω RLED1 = 200mV / (15mA – 5mA) = 20 Ω
ILED VIN CIN CE ON/OFF VSS RLED signal SW1 FB RLED1 Lx CL
Figure : Circuit using Step-wise Regulation of LED Current
7/23
XC9116 Series
■APPLICATION INFORMATION (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.) 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.
ZD XC9116 FB 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 C1 R2
ILED
(
)
R1 RLED
Figure : Circuit inputting a PWM signal to the FB pin 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.
L:22uH VLF3010A VIN 3.6V (3.2V~6.0V) SD XB0ASB03A1B
VIN CIN 4.7uF CE GND
Lx XP151A21A2 FB RLED 10Ω 20mA
CL 0.22uF (base)
8/23
XC9116
Series
■APPLICATION INFORMATION (Continued)
It is possible to illuminate three-series two parallel white LEDs, six in total, using an input voltage VIN≧3.2V.
L:22uF CDRH3D16 VIN 3.2V~6.0V SD XB0ASB03A1B
CIN: 4.7uF
VIN
Lx CL: 0.22uF
CE VSS
FB RLED1 10Ω RLED1 10Ω
An LED current 65mA (MAX.) can be supplied to two white LEDs.
L VIN SD
ILED VIN CIN RLED1 CE ON/OFF VSS RLED signal SW1 FB Lx CL
Supply source of the step-up circuit can be used separately from VIN pin.
SD L:22uF VLF3010A XB0ASB03A1B VIN 1.7V~ 3.0V CIN 4.7uF CDD 4.7uF VIN CE VSS Lx FB RLED 20Ω 10mA CL 0.22uF
L:22uF SD VLF3010A XB0ASB03A1B VIN 1.4V~ 3.0V CIN 4.7uF CDD 4.7uF VIN CE VSS Lx FB RLED 20Ω 10mA CL 0.22uF
Circuit example of separating supply source of the step-up circuit from VIN pin ( 3 LEDs) Note: Please input 2.5V~6V to the VIN pin when you use.
Circuit example of separating supply source of the step-up circuit from VIN pin ( 2 LEDs)
9/23
XC9116 Series
■APPLICATION INFORMATION (Continued)
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.
L:22uF VLF3010A VIN 2.5V~6.0V ZD MAZ8180 CIN 4.7uF VIN Lx R1 CE VSS FB 100Ω R LED 10Ω CL 0.22uF SBD XB0ASB03A1B
20mA
Note : The XC9116B02A series requires neither the Zener diode (ZD) nor the resistor 1 (R1).
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)
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 CL GND
4 3
V OUT
VIN SBD L
●XC9116D Series Pattern Layout (SOT-25)
5
1
2
LED RLED
ZD
CE
R1
CL GND
4 3
V OUT
VIN SBD L
5
1
2
11/23
XC9116 Series
■ TEST CIRCUITS
●Circuit ① XC9116B02A series ●Circuit ① XC9116D02A series
●Circuit ②
OSC Rpull A V IN CE V IN 1uF V CE VSS VFB Lx FB 220uF Vpull
●Circuit ③
A A VIN 1uF VCE
VIN CE V SS
Lx FB A VLx VFB A
●Circuit ④
OSC VIN CE V IN
1uF VCE
10ohm
300ohm 1uF 4.4V
Lx FB V SS
2SK583
11kohm Vpull 220uF 1.1kohm 0.01uF
V
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 (2) Supply Current 2 vs. Input Voltage
1200
Supply Current 1 IDD1 (uA)
VCE=3.0V,VFB=0V Vpull=5V,Rpull=100ohm
VIN=Lx,VCE=3.0V,VFB=0.4V
140
Supply Current2 IDD2 (uA)
1000 800 600 400 200 0
85oC Ta=25 C
o
120 100 80 60 40 20 0 2 3 4 5 6
-40oC Ta=25oC 85 C
o
-40oC
2
3
4
5
6
Input Voltage VIN (V)
Input Voltage VIN (V)
(3) Oscillation Frequency vs. Input Voltage
(4) Maximum Duty Cycle vs. Input Voltage
Oscillation Frequency Fosc (MHz)
VCE=3.0V,VFB=0V Vpull=5V,Rpull=100ohm 85 C
o
Maxmum Duty Cycle MAXDTY(%)
1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 2 3 4 5 6
-40oC Ta= 25 C
o
98 96
-40oC
VCE=3.0V,VFB=0V Vpull=5V,Rpull=100ohm
94 92 90 88 86 2 3 4 5 6
Ta=25oC 85oC
Input Voltage VIN (V)
Input Voltage VIN (V)
(5) Stand-by Current vs. Input Voltage
(6) Maximum LED Current vs. Input Voltage
VCE=3.0V,LED:NSPW310BS L=22uH(VLF3010),CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B Ta=25oC
VCE=0V,VFB=0V,VLx=5V
Max LED Current ILED_MAX(mA)
1.0
Standby Current ISTB (uA)
250 200
0.8 0.6 0.4
85 C
o
10V
150 100 50
13V VOUT=7V
Ta=25 C,-40 C
o
o
0.2 0.0 2 3 4 5 6
16V
0 2 3 4 5 6
Input Voltage VIN (V)
Input Voltage VIN(V)
13/23
XC9116 Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(7) Lx On Resistance vs. Input Voltage (8) Current Limit vs. Input Voltage
LxxON Resistance R Rswon ohm)) L ON Resistance SWON ( (
6.0 5.0 4.0 3.0 2.0 1.0 0.0 2
Ω
VCE=3.0V,VLx=0.4V,Rpull=10ohm,Tr:2SK583
700
Current Limit ILIM (mA)
VCE=3.0V,VLx=0.4V,Rpull=10ohm,Tr:2SK583
600 500 400 300
85oC -40oC
-40 C
o
Ta=25 C
o
200 100 0 2 3
Ta=25oC
85oC
3
4
5
6
4
5
6
Input Voltage VIN (V)
Input Voltage VIN (V)
(9) FB Voltage vs. Ambient Temperature
(10) Lx Overvoltage Limit vs. Input Voltage
0.205 0.200 0.195 0.190 -50 -25 0 25 50 75 100
Lx Over Voltage Limit VLxOVL(V) Lx Over Voltage Limit VLxOVL (V)
0.210
Feed Back Voltage VFB(V)
VCE=3.0V,LED:NSPW310BS L=22uH(VLF3010),CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
VCE=3.0V,VFB=0V,Rpull=300ohm
22
21 20 19
-40oC,85oC
Ta=25oC
18 2 3 4 5 6
Ambient Temperature Ta (OC)
Input Voltage VIN(V)
(11) CE ’H’ Voltage vs. Input Voltage
VFB=0V,Vpull=5V,Rpull=100ohm
(12) CE ’L’ Voltage vs. Input Voltage
VFB=0V,Vpull=5V,Rpull=100ohm
0.65 0.60
CE 'H' Voltage VCEH(V)
0.65 0.60
CE 'L' Voltage VCEL(V)
0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 2
-40oC
0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 2
-40oC
85oC Ta=25oC
85oC Ta=25oC
3
4
5
6
3
4
5
6
Input Voltage VIN (V)
Input Voltage VIN (V)
14/23
XC9116
Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(13) Efficiency vs. Input Voltage XC9116B02AMR, 3 LEDs in series
L=22uH(VLF3010)
100
Efficiency EFFI (%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 30mA
L=10uH(VLF3010)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 30mA
90 80
20mA
90 80 70 60
Ta=25oC ILED=10mA 20mA
70 60
ILED=10mA
Ta=25oC
50 2 3 4 5 6
50 2 3 4 5 6
Input Voltage VIN (V)
Input Voltage VIN(V)
L=22uH(CDRH3D16)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 30mA
L=10uH(CDRH3D16)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 30mA
90 80 70 60
Ta=25oC ILED=10m I LED=10m A A 20mA
90 80
ILED=10mA 20mA
70 60
Ta=25oC
50 2 3 4 5 6
50 2 3 4 5 6
Input Voltage VIN(V)
Input Voltage VIN(V)
L=22uH(CBC2518)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
L=10uH(CBC2518)
100 90
20mA VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
90 80 70 60
ILED=10mA
Efficiency EFFI(%)
30mA
80 70 60
ILED=10mA
30mA
20mA
Ta=25oC
Ta=25oC
50 2 3 4 5 6
50 2 3 4 5 6
Input Voltage VIN(V)
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)
100
Efficiency EFFI (%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 20mA
L=10uH(VLF3010)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 30mA
90 80 70
ILED=10mA 30mA
90 80 70 60
Ta=25oC ILED=10mA 20mA
60
Ta=25oC
50 2 3 4 5 6
50 2 3 4 5 6
Input Voltage VIN (V)
Input Voltage VIN(V)
L=22uH(CDRH3D16)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 30mA
L=10uH(CDRH3D16)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B 30mA
90 80
ILED=10mA 20mA
90 80
ILED=10mA 20mA
70 60
Ta=25oC
70 60
Ta=25oC
50 2 3 4 5 6
50 2 3 4 5 6
Input Voltage VIN(V)
Input Voltage VIN(V)
L=22uH(CBC2518)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
L=10uH(CBC2518)
100
Efficiency EFFI(%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B Ta=25oC
90 80 70
30mA
90 80 70 60
ILED=10mA 20mA 30mA
20mA
60 50 2 3
ILED=10mA Ta=25oC
50 4 5 6 2 3 4 5 6
Input Voltage VIN(V)
Input Voltage VIN(V)
16/23
XC9116
Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(13) Efficiency vs. Input Voltage (Continued) XC9116B02AMR, 2 parallel legs with 3 LEDs per leg
L=22uH(VLF3010)
100
Efficiency EFFI (%)
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B ILED=10mA
90 80 70
30mA
60 50 2
20mA Ta=25oC
3
4
5
6
Input Voltage VIN (V)
(14) Efficiency vs. LED Current XC9116B02AMR, 3 LEDs in series
L=10uH
100 90 80 70 60 50 40 30 20 10 0 0
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B L:CDRH3D16
L=22uH
100 90 80 70 60 50 40 30 20 10 0 0
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B L:CDRH3D16
Efficiency EFFI(%)
Efficiency EFFI(%)
CBC2518
CBC2518 VLF3010A
VLF3010A
VIN=3.6V
VIN=3.6V
5
10
15
20
25
30
5
10
15
20
25
30
LED Current ILED(mA)
LED Current ILED(mA)
XC9116B02AMR, 4 LEDs in series
L=10uH
100 90 80 70 60 50 40 30 20 10 0 0
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B L:CDRH3D16
L=22uH
VCE=3.0V LED:NSPW310BS,CIN=4.7uF(Ceramic) CL=0.22uF(Ceramic), SBD:XB0ASB03A1B
CBC2518 VLF3010A
VIN=3.6V
100 90 80 70 60 50 40 30 20 10 0 0
L:CDRH3D16
Efficiency EFFI(%)
Efficiency EFFI(%)
CBC2518
VLF3010A
VIN=3.6V
5
10
15
20
25
30
5
10
15
20
25
30
LED Current ILED(mA)
LED Current ILED(mA)
17/23
XC9116 Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(15) Average LED Current vs. Input Voltage
CE CLK=100Hz,4 LEDs in series
Average LED Current ILED_ave (mA)
CE CLK=1kHz,4 LEDs in series
25 20
100% L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
Average LED Current ILED_ave(mA)
25 20
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
100%
15
Dimming PWM Duty=50%
15
Dimming PWM Duty=50%
10 5 0 2.5
Ta= 85oC 25oC -40oC
10 5 0 2.5
Ta= 85oC 25oC -40oC
3.0
3.5
4.0
4.5
5.0
3.0
3.5
4.0
4.5
5.0
Input Voltage VIN (V)
Input Voltage VIN (V)
CE CLK=10kHz,4 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
CE CLK=100Hz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
25 20
100%
25 20
100%
15
Dimming PWM Duty=50%
15
Dimming PWM Duty=50%
10 5 0 2.5
Ta= 85oC 25oC -40oC
10 5 0 2.5
Ta= 85oC 25oC -40oC
3.0
3.5
4.0
4.5
5.0
3.0
3.5
4.0
4.5
5.0
Input Voltage VIN (V)
Input Voltage VIN (V)
CE CLK=1kHz,3 LEDs in series
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
CE CLK=10kHz,3 LEDs in series
25 20
100% L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
25 20
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
100%
15
Dimming PWM Duty=50%
15
Dimming PWM Duty=50%
10 5 0 2.5
Ta= 85oC 25oC -40oC
10 5 0 2.5
Ta= 85oC 25oC -40oC
3.0
3.5
4.0
4.5
5.0
3.0
3.5
4.0
4.5
5.0
Input Voltage VIN (V)
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
XC9116
Series
■ TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(16) Average LED Current vs. Dimming PWM Duty
CE CLK=100Hz,4 LEDs in series
Average LED Current ILED_ave(mA)
CE CLK=1kHz,4 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
VIN=2.5V
Average LED Current ILED_ave (mA)
20 16 12 8 4
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
20
2.7V 3.2V 4.2V 5.0V
16 12 8 4 0
VIN=2.5V 2.7V 3.2V 4.2V 5.0V
Ta=25oC
0 0 20 40 60 80 100
0
20
40
60
80
100
Dimming PWM DUTY (%)
Dimming PWM DUTY (%)
CE CLK=10kHz,4 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
CE CLK=100Hz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
VIN=2.5V
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
20 16 12 8 4
Ta=25oC
2.7V 3.2V 4.2V 5.0V
20
VIN=2.5V
16 12 8 4
2.7V 3.2V 4.2V 5.0V
Ta=25oC
0 0 20 40 60 80 100
0 0 20 40 60 80 100
Dimming PWM Duty (%)
Dimming PWM Duty (%)
CE CLK=1kHz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
CE CLK=10kHz,3 LEDs in series
L=22uH(VLF3010),CL=0.22uF(Ceramic) R1=10ohm,SBD:XB0ASB03A1B
Average LED Current ILED_ave(mA)
Average LED Current ILED_ave(mA)
20
VIN=2.5V
20
VIN=2.5V
16 12 8 4
2.7V 3.2V 4.2V 5.0V
16 12 8 4
2.7V 3.2V 4.2V 5.0V
Ta=25oC
Ta=25oC
0 0 20 40 60 80 100
0 0 20 40 60 80 100
Dimming PWM Duty (%)
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
F
PRODUCT SERIES XC9116 x 02AM x
* Character inversion used. SOT-25 (TOP VIEW) 2 Represents Lx overvoltage limit MARK B D 3 Represents oscillation frequency MARK A OSCILLATION FREQUENCY 1MHz PRODUCT SERIES XC9116 x 02AM x Lx OVERVOLTAGE LIMIT Available Not Available PRODUCT SERIES XC9116B02AM x XC9116D02AM x
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 K 2 Represents Lx overvoltage limit USP-6B (TOP VIEW) MARK B D 34 Represents FB voltage MARK ③ 0 ④ 2 FB VOLTAGE (V) 0.2 PRODUCT SERIES XC9116 x 02AD x Lx OVERVOLTAGE LIMIT Available Not Available PRODUCT SERIES XC9116B02AD x XC9116D02AD x PRODUCT SERIES XC9116 x 02AD x
5 Represents oscillation frequency MARK A OSCILLATION FREQUENCY 1MHz PRODUCT SERIES XC9116 x 02AD x
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
