MAX8647ETE+ Maxim Integrated Products, MAX8647ETE+ Datasheet

IC LED DRVR WT/RGB BCKLGT 16TQFN

MAX8647ETE+

Manufacturer Part Number
MAX8647ETE+
Description
IC LED DRVR WT/RGB BCKLGT 16TQFN
Manufacturer
Maxim Integrated Products
Type
Backlight, White LED, RGB (I²C Interface)r
Datasheet

Specifications of MAX8647ETE+

Constant Current
Yes
Topology
PWM, Switched Capacitor (Charge Pump)
Number Of Outputs
6
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
RGB, White LED
Frequency
1MHz
Voltage - Supply
1.7 V ~ 5.5 V
Voltage - Output
5V
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
24mA
Internal Switch(s)
Yes
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Supply Current
1.6 mA
Maximum Power Dissipation
1667 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Efficiency
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX8647/MAX8648 drive up to six white LEDs or
two sets of RGB LEDs with regulated constant current
for display backlight and fun light applications. By utiliz-
ing an inverting charge pump and extremely low-
dropout adaptive current regulators, these ICs achieve
very high efficiency over the full 1-cell Li+ battery volt-
age range and even with large LED forward voltage
mismatch. The 1MHz fixed-frequency switching allows
for tiny external components. The regulation scheme is
optimized to ensure low EMI and low input ripple. The
MAX8647/MAX8648 include thermal shutdown, open-
and short-circuit protection.
The MAX8647 features an I
MAX8648 features a three-wire serial-pulse logic inter-
face. Both devices support independent on/off and
dimming for main and subbacklights. The dimming
ranges are pseudo-logarithmic from 24mA to 0.1mA
and off in 32 steps. Both devices include a temperature
derating function to safely allow bright 24mA full-scale
output current setting while automatically reducing cur-
rent to protect LEDs at high ambient temperatures
above +60°C.
The MAX8647/MAX8648 are available in a 16-pin, 3mm
x 3mm thin QFN package (0.8mm max height).
19-0790; Rev 1; 9/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
( ) DESIGNATE PINS ON THE MAX8648
TOP VIEW
Six White/RGB LEDs in 3mm x 3mm Thin QFN
White LED Backlighting, Single or Dual Display
Wide-Gamut RGB LED Display Backlighting
Camera Flash or RGB Indicators
Cellular Phones and Smartphones
PDAs, Digital Cameras, and Camcorders
SDA (ENC)
SCL (ENB)
V
DD
(ENA)
LED1
13
14
15
16
________________________________________________________________ Maxim Integrated Products
+
12
1
THIN QFN
General Description
MAX8647ETE
MAX8648ETE
11
2
Pin Configuration
2
10
3
C serial port, while the
9
4
Applications
Ultra-Efficient Charge Pumps for
8
7
6
5
LED6
NEG
C1N
C2N
♦ Six Adaptive Current Regulators
♦ Independent Voltage Supply for Each LED
♦ Individual LED Brightness Control (MAX8647)
♦ 24mA to 0.1mA Dimming Range
♦ ±2% Accuracy, ±0.4% Matching (typ)
♦ Low 70µA Quiescent Current
♦ Low 1µA Shutdown Current
♦ Inrush Current Limit
♦ T
♦ 16-Pin, 3mm x 3mm Thin QFN Package
Note: All devices are specified over the -40°C to +85°C extended
temperature range.
+ Denotes a lead-free package.
* EP = Exposed paddle.
M A X8 6 4 7 E TE + I
M A X8 6 4 8 E TE +
2.7V TO 5.5V
INTERFACE
A
INPUT
PART
SERIAL-
I
Serial-Pulse Dimming Logic (MAX8648)
PULSE
2
Derating Function Protects LEDs
1μF
C Interface (MAX8647)
S eri al -p ul se
2
DIMMING
Typical Operating Circuit
C interface 16 Thi n QFN- E P *
l ogi c
ENA
ENB
ENC
IN
GND
C1P
1μF
Ordering Information
C1N
MAX8648
PIN
PACKAGE
16 Thi n QFN- E P *
C2P
1μF
C2N
LED1
LED2
LED3
LED4
LED5
LED6
NEG
EP
MARK
Features
TOP
AFD
OR RGB LED
AFE
1μF
WHITE
D1
D2
D3
D4
D5
D6
T1633- 5
T1633- 5
CODE
PKG
1

Related parts for MAX8647ETE+

MAX8647ETE+ Summary of contents

Page 1

... THIN QFN ( ) DESIGNATE PINS ON THE MAX8648 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. Ultra-Efficient Charge Pumps for ♦ Six Adaptive Current Regulators ♦ Independent Voltage Supply for Each LED ♦ ...

Page 2

Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN ABSOLUTE MAXIMUM RATINGS V , IN, SCL, SDA, ENA, ENB, ENC to GND........-0.3V to +6. IN, SCL, SDA, ENA, ENB, ENC to NEG ........-0.3V ...

Page 3

Six White/RGB LEDs in 3mm x 3mm Thin QFN ELECTRICAL CHARACTERISTICS (continued 3.6V 0V -40°C to +85°C, unless otherwise noted. Typical values are at T VDD IN GND A PARAMETER SDA Output ...

Page 4

Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN ELECTRICAL CHARACTERISTICS (continued 3.6V 0V -40°C to +85°C, unless otherwise noted. Typical values are at T VDD IN GND ...

Page 5

Six White/RGB LEDs in 3mm x 3mm Thin QFN (V = 3.6V circuit of Figure EN_ IN EFFICIENCY vs. SUPPLY VOLTAGE (DRIVING SIX LEDs) 100 20.8mA/LED 60 50 6.4mA/LED 40 ...

Page 6

Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN (V = 3.6V circuit of Figure EN_ IN LED CURRENT vs. TEMPERATURE -40 ...

Page 7

Six White/RGB LEDs in 3mm x 3mm Thin QFN PIN NAME MAX8647 MAX8648 GND 3 3 C1P 4 4 C2P 5 5 C2N 6 6 C1N 7 7 NEG 8–13 8–13 LED6–LED1 14 — SDA ...

Page 8

Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN Detailed Description The MAX8647/MAX8648 have an inverting charge pump and six current regulators capable of 24mA each to drive six white LEDs or two sets of RGB ...

Page 9

Six White/RGB LEDs in 3mm x 3mm Thin QFN C1P V IN 2. 1μF GND V (ENA SCL (ENB) SERIAL PULSE INTERFACE SDA (ENC) AND CONTROL MAX8647 MAX8648 ( ) ARE ...

Page 10

Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN 2 Table Control Data Byte—Device Address 0x9A FUNCTION C2 Not used 0 LED1 current 0 LED2 current 0 LED3 current 0 LED4 current 1 ...

Page 11

Six White/RGB LEDs in 3mm x 3mm Thin QFN LOW HIGH SCL SDA SU_STA HD_STA SU_DAT A = START CONDITION B = MSB OF ADDRESS CLOCKED INTO SLAVE C = LSB OF ADDRESS ...

Page 12

Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN INITIAL > 120μs 24mA 22.4 I LED_ 0mA Figure 3. EN_ Timing Diagram Capacitor Selection Ceramic capacitors are recommended due ...

Page 13

Six White/RGB LEDs in 3mm x 3mm Thin QFN 1μF 1μF C1P C1N C2P C2N INPUT NEG 2.7V TO 5.5V IN 1μF GND MAX8647 LED1 2 LED2 SDA I C PORT ON/OFF AND BRIGHTNESS LED3 SCL LED4 V LOGIC 1.7V ...

Page 14

Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) E MARKING E/2 AAAA ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2007 Maxim Integrated Products ...

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