SC604AIMLTR Semtech, SC604AIMLTR Datasheet

no-image

SC604AIMLTR

Manufacturer Part Number
SC604AIMLTR
Description
IC,Laser Diode/LED Driver,LLCC,16PIN,PLASTIC
Manufacturer
Semtech
Datasheet

Specifications of SC604AIMLTR

Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SC604AIMLTR
Manufacturer:
SEMTECH
Quantity:
2 505
Part Number:
SC604AIMLTR
Manufacturer:
SEMTECH
Quantity:
15 000
Part Number:
SC604AIMLTR
Manufacturer:
Semtech
Quantity:
25 821
Part Number:
SC604AIMLTRT
Manufacturer:
SEMTECH
Quantity:
12 655
Part Number:
SC604AIMLTRT
Manufacturer:
SEMTECH42
Quantity:
130
Part Number:
SC604AIMLTRT
Manufacturer:
SEMTECH
Quantity:
100 495
Company:
Part Number:
SC604AIMLTRT,SEMTECH,0609+,QFN,3000
0
Company:
Part Number:
SC604AIMLTRT,SEMTECH/
0
Part Number:
SC604AIMLTRT.
Manufacturer:
SC
Quantity:
7 994
Part Number:
SC604AIMLTRT1
Manufacturer:
SEMTECH
Quantity:
689
The SC604A is a very high efficiency charge pump white
LED driver driver from the mAhXLife
optimized for Li-Ion battery applications.
The four (4) LED outputs are current matched for consis-
tent LED brightness. Extremely low battery current is
achieved by automatically reconfiguring the charge pump
to match circuit conditions. Using four LEDs, each at
20mA for a total I
than 83mA from the supply for most of the battery life.
Patented low noise mode switching circuitry and constant
output current allow the use of extremely small input and
output capacitors.
June 27, 2005
Typical Application Circuit
POWER MANAGEMENT
OBJECTIVE -NOVEMBER
Description
9, 2000
BATTERY
OUT
= 80mA, the SC604A can use less
1µF
TM
family of products,
CTRL0
CTRL1
CTRL2
GND
EN
VIN
C1+
1µF
SC604A
C1-
1
C2+
Patent Pending
Features
Applications
1µF
Cellular phones
LED backlighting
Digital 3 bit output control logic
1x, 1.5x and 2x charge pump modes of operation
PDA power supplies
Very high efficiency over 90% of battery life
Current regulation for up to 4 LEDs
Current matching tolerance of ±3% typical
Wide current range per LED [0.5mA - 30mA]
High available total LED current = 4 I
Soft start / In-rush current limiting
MLP-16 [4x4] Package
Fixed frequency 250kHz
Portable devices
Peak efficiency over 92%
Low Shutdown Current: 1µA typical
Short circuit protection
VOUT
ILED1
ILED2
ILED3
ILED4
ISET
C2-
Regulated White LED Driver
Low Noise, High Efficiency
1µF
United States Patents: 6,504,422, 6,794,926
LCD Modules
Electronic books
Wireless web appliances
www.semtech.com
SC604A
LED
= 120mA

Related parts for SC604AIMLTR

SC604AIMLTR Summary of contents

Page 1

... VIN VOUT SC604A EN CTRL0 ILED1 CTRL1 ILED2 CTRL2 ILED3 ILED4 GND ISET C1- C1+ C2+ C2- 1µF 1µF 1 SC604A Low Noise, High Efficiency Regulated White LED Driver Electronic books Wireless web appliances LCD Modules 1µF United States Patents: 6,504,422, 6,794,926 www.semtech.com = 120mA LED ...

Page 2

... Electrical Characteristics section is not implied Note: (1) By JESD51 standards Electrical Characteristics Unless specified -40°C to 85° 2.85V to 5.5V 1.0 F (ESR = 0.03 ). Typical values @ This device is ESD sensitive. Use of standard ESD handling precautions is required 2005 Semtech Corp < < < < SC604A =25°C, LED V = 3.4V ± ± ...

Page 3

... POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified -40°C to 85° 2.85V to 5.5V 1.0 F (ESR = 0.03 ). Typical values @ Notes: (1) Guaranteed by design 2005 Semtech Corp SC604A =25°C, LED V = 3.4V www.semtech.com µ µ ...

Page 4

... These modes boost the battery input voltage and ensure there is enough voltage at V that the regulated current will flow through the LEDs and return via the I pins. LED 2005 Semtech Corp. Input Current The total input current of the SC604A is a function of resistor (I SET LED the sum of the LED currents, the charge pump mode and the quiescent current ...

Page 5

... Pin Descriptions Note: (1) The CTRL word must match the outputs in use. 2005 Semtech Corp. Ordering Information GND 12 C2+ 11 Notes: (1) Available in tape and reel only. A reel contains 3000 devices. 10 C2- (2) Available in lead-free package only. This product is fully WEEE and 9 RoHS compliant. C1 SC604A ...

Page 6

... The sequencing of Enable and logic state CTRL{2,1, will affect quiescent state current. I CTRL{2,1,0} transitions to [ 400µA if Enable transitions high after CTRL{2,1,0} transitions to [1, 1, 1]. If Enable = high and CTRL{2,1,0}= [ used for an extended period of time recommended that Enable = High when change to the [ state to achieve the lower I 2005 Semtech Corp. ILED4 ILED3 ILED2 14 ...

Page 7

... For best matching performance it is recommended that the Vf between LEDs be under 250mV. (For more information on Vf considerations refer to Semtech application notes). 2005 Semtech Corp. Designing for Lowest Possible Battery Current The SC604A efficiency and battery current are shown in the plots that follow on page 8 ...

Page 8

... Semtech 1x mode 90% of Li-Ion battery life 3.9 3.8 3.7 3.6 VIN [V] Semtech 1x mode Competition 1.5x mode 90% of Li-Ion battery life 3.9 3.8 3.7 3.6 VIN [V] 8 SC604A Semtech 1.5x mode 3.5 3.4 3.3 3.2 Semtech 1.5x mode 3.5 3.4 3.3 3.2 www.semtech.com ...

Page 9

... LED current allow for brightness control. 1000 950 900 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 100 50 0 0.5 1 1.5 2 2.5 2005 Semtech Corp. Table 2 - Resistor Value Selection ...

Page 10

... PWM applications are also possible with this circuit by application of RC filtering. (Consult with Semtech for detailed application support). Figure 1 - Analog Voltage for LED Current Control Table 3 - Analog Voltage for LED Current Control ...

Page 11

... I to increase to approximately 100k. IN Table 4 - Summary of LED Current Control Note: 1) “N” is the number of NMOS transistors used for brightness control. 2005 Semtech Corp. to set the on state SET . Frequency <100Hz can will work SC604A Figure 3 - PWM Example Circuit < ...

Page 12

... Total Load Current [mA] Mode Transition Voltage vs. LED Voltage 3 1.5X Mode for 4 LEDs 3 3.6V 3.7 3 3.4V 3.5 3 3.2V 3.3 3 LED Current [mA] 2005 Semtech Corp. OVP Event with LED Open Circuit 100 VIN = 3.8V VIN = 4.0V 90 VIN = 4. 100 120 SC604A Efficiency vs. Load at Low Battery VIN = 3 ...

Page 13

... Input Voltage [V] Battery Current for 4 LEDs at 10mA 4.2 4 3.8 Input Voltage [V] Battery Current for 4 LEDs at 0.5mA 4 3.5 LED = 2.91V 3 2.5 2 1.5 4.2 4 3.8 Input Voltage [V] 2005 Semtech Corp. 100 LED = 3.45V 3.6 3.4 3.2 4.2 100 90 LED = 3.37V 3.6 3.4 3.2 4.2 70 ...

Page 14

... POWER MANAGEMENT Typical Characteristics with 4 LEDs Ripple in 1x Mode for 4 LEDs at 20mA Each Ripple in 1.5x Mode for 4 LEDs at 20mA Each Ripple in 2x Mode for 4 LEDs at 20mA Each 2005 Semtech Corp. 14 SC604A www.semtech.com ...

Page 15

... POWER MANAGEMENT Evaluation Board Schematic 2 NEG 2 2005 Semtech Corp ISET ILED1 VOUT ILED2 6 15 VIN ILED3 7 14 C1+ ILED4 SC604A www.semtech.com ...

Page 16

... J5 - Evaluation Board Gerber Plots Top View 2005 Semtech Corp. Comment Component references in bold are the only essential design components. Bucket, input and output capacitors. Ceramic, low ESR type, 6.3V rating or higher. This extra capacitor supports usage of long power leads from benchtop supply. ...

Page 17

... PIN 1 INDICATOR (LASER MARK) A aaa C E1 NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. Marking Information 604A yyww yyww = Datecode (Example: 0452) 2005 Semtech Corp. DIM MIN D A .031 B A1 .000 - A2 b .010 D .153 D1 ...

Page 18

... POWER MANAGEMENT Land Pattern MLP-16pin [4x4 (C) X NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Phone: (805) 498-2111 FAX (805)498-3804 2005 Semtech Corp. K DIM Semtech Corporation Power Management Products Division ...

Related keywords