CAT Channel LED Driver with 32 Dimming Levels & PWM

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CAT3696 LED.33x.5x %.5.5 V LED LED5 ma (ADIM) 3 PWM(PWM)LED PWM khzpwm (CABC) ADIMPWM3 ms CAT369.33x.33x x.33x.5xx 6LED5 ma CABC khzpwm EZDim3(ADIM) 9% 3mm x 3mm6TQFN /BFRRoHS (Note ) LCD.

1 CAT3696 LED.33x.5x %.5.5 V LED LED5 ma (ADIM) 3 PWM(PWM)LED PWM khzpwm (CABC) ADIMPWM3 ms CAT369.33x.33x x.33x.5xx 6LED5 ma CABC khzpwm EZDim3(ADIM) 9% 3mm x 3mm6TQFN /BFRRoHS (Note ) LCD. Figure C+ C C+ C TQFN 6 HV3 SUFFIX CASE 5AD PIN CONNECTIONS VIN VOUT CPWM PWM GND LED LED LED3 (Top View) MARKING DIAGRAM JABA AXXX YWW ADIM LED6 LED5 LED JABA = CAT369HV3 GT A = Assembly Location XXX = Last Three Digits of Assembly Lot Number Y = Production Year (Last Digit) WW = Production Week (Two Digits) Device Package Shipping CAT369HV3 GT ORDERING INFORMATION TQFN 6 (Pb Free) / Tape & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8/D. Semiconductor Components Industries, LLC, August, Rev. 3 Publication Order Number: CAT369JP/D

2 Figure. Typical Application Circuit Table. ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit VIN, LEDx, C±, C±, PWM, ADIM, CPWM voltage GND.3 to 6 V VOUT GND.3 to 7 V Storage Temperature Range 65 to +6 C Junction Temperature Range to +5 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table. RECOMMENDED OPERATING CONDITIONS Parameter Rating Unit VIN. to 5.5 V Ambient Temperature Range to +85 C LED pin Current range to 5 ma Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Table 3. RECOMMENDED ADIM, PWM TIMING (For. V V IN 5.5 V, over full ambient temperature range C to +85 C.) Parameter Symbol Conditions Min Typ Max Units ADIM program low time T LO. s ADIM program high time T HI. s ADIM to LED current settling time T LED No CPWM capacitor s ADIM or PWM low time to shutdown T PWRDWN.5 3 ms PWM to VOUT delay time T PWM VOUT s PWM maximum frequency F PWM MAX khz PWM minimum duty cycle DC PWM MIN khz PWM frequency %

3 Figure. ADIM Dimming Timing Diagram (no C PWM, PWM high) Table. ELECTRICAL OPERATING CHARACTERISTICS (Notes and 3) Parameter Symbol Conditions Min Typ Max Unit Quiescent Current (excluding load) I Q x mode.33 x mode, V IN = 3 V.5x mode, V IN =.8 V x mode, V IN =.6 V Shutdown Current I QSHDN V ADIM = V A ma LED Current Setting I LED SET After ADIM is first enabled (full scale LED current) LED Current Accuracy I LED ACC (I LEDx I NOMINAL ) / I NOMINAL 5 ma I LED setting LED Channel Matching I LED DEV (I LED I LEDAVG ) / I LEDAVG 5 ma I LED setting 5 ma ± + % 5 ±.5 +5 % CPWM Pin Regulated Voltage V CPWM V PWM = V IN.6 V Output Resistance (open loop) R OUT x mode.33x mode, V IN = 3 V.5x mode, V IN =.7 V x mode, V IN =. V Charge Pump Frequency F OSC.33x and x mode.5x mode Output short circuit Current Limit I SC_MAX V OUT <.5 V 5 ma Input Current Limit I IN_MAX V OUT > V, x mode 5 ma x to.33x Transition Thresholds at any LED pin V LEDTH 5 ma LED current per channel mv ADIM and PWM Pins Pull down resistance Logic High Level Logic Low Level.8 R PD V HI V LO.3 Thermal Shutdown T SD 5 C Thermal Hysteresis T HYS C Undervoltage lockout (UVLO) threshold V UVLO. V Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions.. Typical values are at V IN = 3.6 V, PWM = ADIM = High, T AMB = 5 C. 3. Min and Max values are over recommended operating conditions unless specified otherwise MHz M V V 3

4 Figure 3. Functional Block Diagram CAT369 x ()LED x.33.33x.33 () x.33x.5x.5x.5x LEDx x x x x x(v HYS ) 3 mv

5 TYPICAL PERFORMANCE CHARACTERISTICS (V IN = 3.6 V, PWM = V IN, I OUT = ma (6 LEDs at ma), C IN = C OUT = C = C = F, C PWM = 7 nf, T AMB = 5 C unless otherwise specified.) QUIESCENT CURRENT (ma) 3 V F = 3.3 V x.33x.5x x QUIESCENT CURRENT (ma) 3 x.5x.33x x V IN =.6 V V IN =.9 V V IN = 3.3 V V IN =. V INPUT VOLTAGE (V) 3. Figure. Quiescent Current vs. Input Voltage.5 TEMPERATURE ( C) Figure 5. Quiescent Current vs. Temperature 8 LED CURRENT VARIATION (%) LED CURRENT VARIATION (%) V F = 3.3 V 8 INPUT VOLTAGE (V) TEMPERATURE ( C) Figure 6. LED Current Change vs. Input Voltage Figure 7. LED Current Change vs. Temperature SWITCHING FREQUENCY (MHz) x Mode 6.33x, x Mode.33x.5x TEMPERATURE ( C) 8 Figure 8. Switching Frequency vs. Temperature OUTPUT RESISTANCE () 8..5 x INPUT VOLTAGE (V).5 5. Figure 9. Output Resistance vs. Input Voltage x 5.5 5

6 TYPICAL PERFORMANCE CHARACTERISTICS (V IN = 3.6 V, PWM = V IN, I OUT = ma (6 LEDs at ma), C IN = C OUT = C = C = F, C PWM = 7 nf, T AMB = 5 C unless otherwise specified.) 9 9 EFFICIENCY (%) x.33x 5 V F = 3.3 V, I LED = ma V F = 3.5 V, I LED = ma x x. EFFICIENCY (%) x V F = 3.3 V, I LED = ma V F = 3.5 V, I LED = ma x.5x INPUT VOLTAGE (V) INPUT VOLTAGE (V) Figure. Efficiency vs. Input Voltage Figure. Efficiency vs. Li Ion Voltage Figure. Power Up in x Mode Figure 3. Power Up in.33x Mode Figure. Power Up in.5x Mode Figure 5. Power Up in x Mode 6

7 TYPICAL PERFORMANCE CHARACTERISTICS (V IN = 3.6 V, PWM = V IN, I OUT = ma (6 LEDs at ma), C IN = C OUT = C = C = F, C PWM = 7 nf, T AMB = 5 C unless otherwise specified.)..6 VOLTAGE (V)..8 V HI V LO INPUT VOLTAGE (V) Figure 6. ADIM, PWM V HI V LO vs. VIN Figure 7. Power Down Delay (x Mode) Figure 8. Operating Waveforms in x Mode Figure 9. Switching Waveforms in.33x Mode Figure. Switching Waveforms in.5x Mode Figure. Switching Waveforms in x Mode 7

8 TYPICAL PERFORMANCE CHARACTERISTICS (V IN = 3.6 V, PWM = V IN, I OUT = ma (6 LEDs at ma), C IN = C OUT = C = C = F, C PWM = 7 nf, T AMB = 5 C unless otherwise specified.) ma OUTPUT VOLTAGE (V) x Mode LED CURRENT (ma) 5 5 ma LOAD CURRENT (ma) Figure. Foldback Current Limit LED PIN VOLTAGE (mv) Figure 3. LED Current vs. LED Pin Voltage Figure. Dimming Waveform Figure 5. khz PWM Dimming, % Duty Cycle LED CURRENT (ma) khz khz 5 khz DUTY CYCLE (%) Figure 6. LED Current vs. PWM Duty Cycles Figure 7. khz PWM Duty Cycle Increasing % to 5% 8

9 Table 5. PIN DESCRIPTION Pin No Name Function C+ Bucket capacitor Positive terminal C Bucket capacitor Negative terminal 3 C+ Bucket capacitor Positive terminal C Bucket capacitor Negative terminal 5 GND Ground Reference 6 LED LED cathode terminal. 7 LED LED cathode terminal. 8 LED3 LED3 cathode terminal. 9 LED LED cathode terminal. LED5 LED5 cathode terminal. LED6 LED6 cathode terminal. ADIM Analog Dimming Control (Active high). 3 PWM Pulse width modulation PWM (Active high). CPWM Connect a capacitor for filtering the PWM signal. 5 VOUT Charge pump output connected to the LED anodes. 6 VIN Charge pump input, connect to battery or supply. TAB GND Connect to GND on the PCB. VIN F VIN.5.5 V (.8 V) LED ADIMLED.3 V. V ADIM LED5 ma 3%LED PWM(PWM)PWM 6 LEDADIM PWMLED mapwm LED ms() ADIMPWM VOUTLED F VOUT GND PCB C+C C C+C C LEDLED6LED TAB TAB PCB CPWMCAT369PWM 9

10 LED5 ma ADIM(n) LED current [ma] 5 3 n (eq. ) 3 n ADIM 3 LED(Figure 8 ) LED3.%(/3)3 LED3.% () LED ns s T LO () T LO ADIMLED 3 msadim LED ADIM (Table 6) Table 6. DIMMING LEVELS LED Current (Typical) [ma] Dimming Pulses [n]

11 Figure 8. ADIM Dimming Timing Diagram (no C PWM, PWM high) C PWM PWM LEDLEDPWM C PWM LED PWM DCLED PWM PWMLED PWM AC PWM (Figure 9)R (5 k) C PWM f C = /π R C PWM PWMf PWM f C f PWM f C or (eq. ) C PWM ( Rf PWM ) (eq. 3) f PWM khz C PWM nf ( (eq. ) ) khzpwm 7 nfc PWM khz PWM C PWM ( LED) (t PU t)c PWM t PU C PWM 3 5 (eq. 5) C PWM 7 nft PU 5 ms A PWM N Buffer R 5 k CPWM V C 7 nf G Voltage controlled current source I = LED current reference I = g x V C (for LED at max current, g =.5) GND Figure 9. PWM Circuit Block Diagram

12 LED LED5 LEDVOUT (Figure 3). V to 5.5 V VIN CIN F CPWM 7 nf F F C+ C C+ C VIN VOUT CAT369 LED LED ADIM LED3 PWM LED CPWM LED5 GND LED6 Figure 3. Application with 5 LEDs COUT F (V OUT )6V LEDLED LEDVOUT LED LED LED LED LED (VOUT).5 VVOUT.5 V 5 LED LED LED(V F = V OUT LED)V 5 A() LED V F V +5 C C LED (V F ).33.8 VLED xv f LEDV f 3.5 VLEDV F 3.3 V. Vx F LED X5RX7R F x () IC C IN C OUT TFQN (TAB)

13 PACKAGE DIMENSIONS TQFN6, 3x3 CASE 5AD ISSUE A TOP VIEW SIDE VIEW BOTTOM VIEW SYMBOL MIN NOM MAX A A...5 A3. REF b D D..8 E E..8 FRONT VIEW e.5 BSC L.3..5 Notes:. All packages are RoHS compliant (Lead free, Halogen free). 5. The standard lead finish is NiPdAu. 6. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. ON SemiconductorONSemiconductor Components Industries, LLC (SCILLC) SCILLC ()SCILLC SCILLC SCILLCSCILLC SCILLC SCILLCSCILLC SCILLC SCILLC PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 563, Denver, Colorado 87 USA Phone: or Toll Free USA/Canada Fax: or Toll Free USA/Canada orderlit@onsemi.com N. American Technical Support: Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: Japan Customer Focus Center Phone: ON Semiconductor Website: Order Literature: For additional information, please contact your local Sales Representative CAT369/D

AND9041JP - NCL30051を使用した高効率 LEDドライバ回路の設計

AND9041JP - NCL30051を使用した高効率 LEDドライバ回路の設計 APPLICATION NOTE 1/6 28% LED (High Brightness LED HB LED) (/W) LED 1 LED LED DC AC AC AC LED LED LED LED 100 LED LED AC LED AC PFC 3 LED AC (Constant Current, CC) LEDLED (Constant Voltage, CV) LED 1Figure