APE1601

APE1601 A-POWER | Alldatasheet

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This datasheet contains new product information. Advanced Power Electronics Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. APE1601/A White LED Driver (120mA Charge Pump with Current Source) ™ GENERAL DESCRIPTION The APE1601 is a high efficiency charge pump white LED driver. It supports up to 4 white LEDs with regulated constant curr ent for uniform intensity. The APE1601 maintains the highest efficiency by utilizi ng a x1/x1.5/x2 fractional charge pump and low dropout current regulators. User can easily configure each LED current up 30mA by an external resistor. Two digital inputs can be programmable to cont rol white LED On/Off. LED dimming can be achieved by applying a PWM signal to the digital control signals. The operating voltage range is 2.5V to 5.5V. Internal soft-start circuitry effectively reduces the in-rush current both while start-up and mode change. APE1601 also provides comprehensive protections such short circuit protection and over-temperature protection. The load is disconnected from VIN while shutdown and the shutdown current is less than 1uA. APE1601 is available in a QFN 3x3mm-16L package. ™ FEATURES - Very High Efficiency Over 90% of Battery Life - Support up to 4 WLEDs - Support up to 120mA Output Current - Soft Start / Short Circuit Protection Function - Three Charge Pump Mode: x1, x1.5, x2 - 250k/1MHz Fixed Frequency Oscillator - RoHS Compliant and 100% Lead (Pb)-Free ™ Block Diagram VOUT 250K/1MHz Oscillation AGND ISET Is Current Brightness and Setting Control Circuit x1/x1.5/x2 Charge Pump Mode Decision Output Selection Logic Current Set Detect Bandgap Voltage LED4 LED3 LED2 LED1 CTRL0 CTRL1 C1P C1N C2P C2N PGND EN VIN Advanced Power Electronics Corp.

™ PIN ASSIGNMET (QFN 3x3mm -16L) Table 1 Control Inputs Output Status CTRL1 CTRL0 LED4 LED3 LED2 LED1 0 0 OFF OFF ON ON 0 1 OFF ON ON ON 1 0 ON ON ON ON 1 1 OFF OFF OFF OFF 1316 1415 (TOP VIEW) EN CTRL0 CTRL1 AGND PGND C2P C2N ISET VOUT VIN C1P LED1 LED2 LED3 LED4 C1N Thermal PAD (GND) PIN Name Description 1 EN Chip Enable (Active High). There should be a pull low 100k Ω resistor connected to GND when the control signal is floating. 2 CTRL0 Output Control Bit 0. (See Table 1) 3 CTRL1 Output Control Bit 1. (See Table 1)

4 AGND Analog Ground

5 ISET

LED current is set by the value of the resistor R SET connected from the ISET pin to ground. Do not short the ISET pin. V ISET is typically 1.2V. All external capacitance at this pin, in cluding board parasitic capacitance, must be less than or equal to 30pF. 6 VOUT Output Voltage Source for connection to the LED anodes.

7 VIN Input Voltage

8 C1P Positive Terminal of Bucket Capacitor 1

9 C1N Negative Terminal of Bucket Capacitor 1

10 C2N Negative Terminal of Bucket Capacitor 2

11 C2P Positive Terminal of Bucket Capacitor 2

12 PGND Power Ground. 13 to 16 LED4~1 Current Sink for LED. (If not in use, pin should be connected to VOUT) (1) PAD GND Exposed pad should be soldered to PCB board and connected to GND. (1) The CTRL word must match the output in use. ™ ORDER/MARKING INFORMATION Order Information Top Marking Package Type VN3: QFN 3X3-16L APE1601X X Frequency Blank : 1.0Mhz A : 250Khz X X X X X

1601 XPart

ID code : internal WW : 01~ 52 Year : 06 = 2006 Blank : APE1601 A APE1601A Advanced Power Electronics Corp. White LED Driver (120mA Charge Pump with Current Source)

™ Absolute Maximum Ratings (at Ta=25℃) Characteristics Symbol Rating Unit VIN Pin Voltage V IN - 0.3 to 6V V VOUT Pin Voltage V OUT - 0.3 to 6V V Storage Temperature Range T ST -65 to +150 ℃ Junction Temperature T J +125 ℃ Thermal Resistance from Junction to ambient θJA 68 ℃/W Power Dissipation[ PD=( TJ-TA ) / θJA ] PD 1.47 W Note : θJA is measured with the PCB copper area of approximately 1 in2(Multi-layer). ™ Operating conditions Characteristics Symbol Rating Unit Operating Temperature Range T OP -40 to +85 ℃ Operating Supply Voltage V OP +2.5 to +5.5 V ™ Electrical Characteristics (VIN = 3.7V, C1=C2=1uF,ESR =0.03Ω,Ta=25°C, unless otherwise specified) Characteristics Symbol Conditions Min Typ Max Units Undervoltage Lockout Threshold V IN rising or falling 1.8 2.1 2.4 V Undervoltage Lockout Hysteresis 50 mV RSET = 24.0K -- 20 -- mA RSET = 96.0K -- 5 -- mA 2.7V < VIN < 5.5V 2 -- 20 mA Current into LEDs 1, 2, 3 and 4 I LED 3.1V < VIN < 5.5V 2 -- 30 mA FOSC =1MHz, EN = High, No Load -- 3 -- mA Quiescent Current I CCQ FOSC =250kHz, EN = High, No Load -- 1.5 -- mA Shutdown Supply Current I SD EN = Low -- 1 7 uA ILED Accuracy ILED-ERR 2mA < ILED < 30mA -- 2 7.5 % Current Matching I LED-LED-ERR 2mA < ILED < 30mA -- 1 5 % x1 mode to x1.5 mode Transition Voltage (VIN falling) VTRANS1X VLED= 3.6V, IOUT= 80mA ILED1 = ILED2 = ILED3 = ILED4 = 20mA -- 3.8 -- V x1.5 mode to x2 mode Transition Voltage (VIN falling) VTRANS1.5X VLED= 3.6V, IOUT= 80mA ILED1 = ILED2 = ILED3 = ILED4 = 20mA -- 2.8 -- V FOSC APE1601 0.8 1.0 1.2 MHz Oscillator Frequency FOSC APE1601A 200 250 300 KHz Input current limit I LIM Short circuit applied from VOUT to GND 450 -- 850 mA Output over voltage protect V OVP Open circuit at any LED that is programmed to be in the ON state -- 5.5 6 V VIH Input high (EN,CTRL0,CTRL1) 2.0 -- -- EN Pin Logic input threshold voltage VIL Input low (EN,CTRL0,CTRL1) -- -- 0.8 V APE1601/AAdvanced Power Electronics Corp. White LED Driver (120mA Charge Pump with Current Source)

IIH VEN=VIN (ON) -- -- 1 uA EN Pin Input Current IIL VEN=GND (OFF) -- -- 1 uA Thermal shutdown Temp TSD 150 ℃ Thermal shutdown Hysteresis 15 ℃ Note 1. X100%AccuracyI I II LED(SET) LED(SET)ED)LED(MEASURLED Note 2. Current Matching refers to the difference in current from on LED to the next. X100%MatchingCurrentI II II LED(MIN)LED(MAX) LED(MIN)LED(MAX)LED ™ Application Circuit A. For 4 WLEDs back light 0.1uF D2 D4 APE1601 EN CTRL0 CTRL1 GND ISET VOUT VIN C1P CIN C2N C2P PGND LED4 LED3 LED2 LED1 VIN=2.5~5.5V RSET COUT 1uF 0.1uF CIN 1uF B. For 3 WLEDs back light 0.1uF D3D1 0.1uF COUT 1uF APE1601 EN CTRL0 CTRL1 GND ISET VOUT VIN C1P CIN C2N C2P PGND LED4 LED3 LED2 LED1 RSETCIN 1uF VIN=2.5~5.5V APE1601/A Advanced Power Electronics Corp. White LED Driver (120mA Charge Pump with Current Source)

C. For 2 WLEDs back light VIN=2.5~5.5V CIN 1uF COUT 1uF RSET 0.1uF 0.1uF APE1601 EN CTRL0 CTRL1 GND ISET VOUT VIN C1P CIN C2N C2P PGND LED4 LED3 LED2 LED1 VIN=2.5~5.5V 0.1uF APE1601 EN CTRL0 CTRL1 GND ISET VOUT VIN C1P CIN C2N C2P PGND LED4 LED3 LED2 LED1 RSET 0.1uF CIN 1uF COUT 1uF D. For 3 WLEDs Camera flash module 0.1uF RADJ COUT 1uF RSET 0.1uF Base Band GPIO2 GPIO1 100K APE1601 EN CTRL0 CTRL1 GND ISET VOUT VIN C1P CIN C2N C2P PGND LED4 LED3 LED2 LED1 CIN 1uF VDD VIN=2.5~5.5V Flash LED DEVICE C1 (uF) C2 (uF) APE1601(1MHz) 0.1 0.1 APE1601A(250KHz) 0.47 0.47 GPIO2: High : VDD (Movie Mode) Low : 0V (Strobe Mode) APE1601/AAdvanced Power Electronics Corp. White LED Driver (120mA Charge Pump with Current Source)

™ Function Descriptions The APE1601/A is a high efficiency charge pump white LED driver. It provides 4 channels low drop-out voltage current source to regulated 4 white LEDs current. For high efficiency, the APE1601/A implements x1/x1.5/x2 mode charge pump. An external RSET is used to set the current of white LED. APE1601/A has an input current regulation to reduce the input ripple. Soft Start The APE1601/A includes a soft start circuit to limit the inrush current at power on and mode switching. Soft start circuit holds the input current level long enough for output capacitor COUT reaching a desired voltage level. Mode Decision The APE1601/A uses a smart mode decision method to select the working mode for maximum efficiency. Mode decision circuit senses the output and LED voltage for up/down selection. Dimming Control CTRL0 and CTRL1 are used to control the on/off of White LED. When an external PWM signal is connected to the control pin, brightness of white LED is adjusted by the duty cycle. LED Current Setting The current of white LED connected to APE1601/A can be set by RSET. Every current flows through the white LED is 400 times greater than the current of RSET. The white LED can be estimated by following equation: ⎛×= SET ISET LED R V I 400 where VISET = 1.2V, and RSET is the resistance connected from ISET to GND. Thermal Shutdown The APE1601/A provides a high current capability to drive 4 white LEDs. A thermal shutdown circuit is needed to protect the chip from thermal damage. When the chip reaches the shutdown temperature 150°C, the thermal shutdown circuit turns off the chip to prevent the thermal accumulation in the chip. Over Voltage Protection The APE1601/A regulates the output voltage by controlling the input current. When the output voltage reaches the designated level, the APE1601/A reduces the input current. And then, the output voltage regulation also serves an over-voltage protection. APE1601/AAdvanced Power Electronics Corp. White LED Driver (120mA Charge Pump with Current Source)

A current limiting circuit is also included in the APE1601/A for short circuit protection. Whenever output source a dangerously high current, the current limiting circuit takes over the output regulation circuit and reduces the output current at an acceptable level. ™ Application Information Selecting Capacitors To get the better performance of APE1601/A, the selecting of peripherally appropriate capacitor and value is very important. These capacitors determine some parameters such as input and output ripple, power efficiency, maximum supply current by charge pump, and start-up time. To reduce the input and output ripple effectively, the low ESR ceramic capacitors are recommended. Generally, to reduce the output ripple, increasing the output capacitance COUT is necessary. However, this will increase the start-up time of output voltage. For LED driver applications, the input voltage ripple is more important than output ripple. Input ripple is controlled by input capacitor CIN, increasing the value of input capacitance can further reduce the ripple. Practically, the input voltage ripple depends on the power supply’s impedance. If a single input capacitor CIN cannot satisfy the requirement of application, it is necessary to add a low-pass filter as shows in Figure 1. 2.2uF APE1601/A VIN VIN GND2.2uF Frgure1. C-R-C filter used to reduce input ripple The flying capacitor C1 and C2 determine the supply current capability of the charge pump and to influence the overall efficiency of system. The lower value will improve efficiency, but it will limit the LED’ s current at low input voltage. APE1601/AAdvanced Power Electronics Corp. White LED Driver (120mA Charge Pump with Current Source)

example, a 3 bit signals can set 8 kinds of different equivalent resister of ISET pin, i.e. resister of ISET pin and control signal. Figure 3. The application circuit of setting LED current which Table 3. The relation between control signal and equivalent resister of ISET pin

Figure 6. The PWM dimming application circuit for 2WLEDs dimming frequency is recommended below 1 kHz. Table 5. The common dimming frequency and its corresponding maximum duty.

Figure 7. Typical layout of APE1601/A’s EVB board

Package Outline : QFN 3x3-16L MIN NOM MAX A 0.750 0.850 0.950 A1 0.000 0.020 0.050 A2 0.175 0.200 0.250 b 0.180 0.230 0.300 D 2.950 3.000 3.050 D2 1.450 1.600 1.750 E 2.950 3.000 3.050 E2 1.450 1.600 1.750 e L 0.350 0.400 0.450 y 1.All Dimension Are In Millimeters. 2.Dimension Does Not Include Mold Protrusions. Part Marking Information & Packing : QFN 3x3-16L ADVANCED POWER ELECTRONICS CORP. Millimeters 0.500 0.080 SYMBOLS Date Code (YYWWS) YY：Last Digit Of The Year WW：Week S：Sequence 1601X YYWWS Part Number Blank : 1MHz A : 250KHz