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MAX8648ETE+

P1-P3P4-P6P7-P9P10-P12P13-P15
MAX8647/MAX8648
Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
4 _______________________________________________________________________________________
Note 1: Limits are 100% production tested at T
A
= +25°C. Specifications over the operating temperature range are guaranteed by design.
Note 2: Guaranteed by design.
Note 3: LED dropout voltage is defined as the LED_ to GND voltage at which current into LED_ drops 10% from the value at V
LED_
= 0.5V.
ELECTRICAL CHARACTERISTICS (continued)
(V
VDD
= V
IN
= 3.6V, V
GND
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Derating-Function Start Temperature +60 °C
Derating-Function Slope From derating-function start temperature -2.5 %/°C
Not utilizing the charge pump 3
LED_ R
DSON
Utilizing the charge pump 4
Ω
Not utilizing the charge pump 60 120
LED_ Dropout
24mA setting
(Note 3)
Utilizing the charge pump 90 200
mV
LED_ Current Regulator Switchover
Threshold (Inactive to Active)
V
LED_
falling 125 150 175 mV
LED_ Current Regulator Switchover
Hysteresis
100 mV
T
A
= +25°C 0.01 5
LED_ Leakage in Shutdown All LEDs off
T
A
= +85°C 0.1
µA
Typical Operating Characteristics
(V
IN
= 3.6V, V
EN_
= V
IN
, circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. SUPPLY VOLTAGE
(DRIVING SIX MATCHED LEDs)
MAX8647/48 toc01
INPUT VOLTAGE (V)
EFFICIENCY (%)
3.93.63.33.0
10
20
30
40
50
60
70
80
90
100
0
2.7 4.2
1.6mA/LED
16mA/LED
20.8mA/LED
6.4mA/LED
EFFICIENCY vs. Li+ BATTERY VOLTAGE
(DRIVING SIX MATCHED LEDs)
MAX8647/48 toc02
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
EFFICIENCY P
LED
/P
BATT
(%)
3.43.53.63.73.83.9
50
60
70
80
90
100
40
4.2 3.0
1.6mA/LED
20.8mA/LED
16mA/LED
6.4mA/LED
EFFICIENCY vs. SUPPLY VOLTAGE
(DRIVING SIX LEDs)
MAX8647/48 toc03
INPUT VOLTAGE (V)
EFFICIENCY (%)
3.93.63.33.0
10
20
30
40
50
60
70
80
90
100
0
2.7 4.2
1.6mA/LED
16mA/LED
LEDs HAVE MISMATCHED V
F
MAX8647/MAX8648
Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
_______________________________________________________________________________________
5
EFFICIENCY vs. SUPPLY VOLTAGE
(DRIVING SIX LEDs)
MAX8647/48 toc04
INPUT VOLTAGE (V)
EFFICIENCY (%)
3.93.63.33.0
10
20
30
40
50
60
70
80
90
100
0
2.7 4.2
6.4mA/LED
20.8mA/LED
LEDs HAVE MISMATCHED V
F
EFFICIENCY vs. Li+ BATTERY VOLTAGE
(DRIVING SIX LEDs)
MAX8647/48 toc05
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
EFFICIENCY P
LED
/P
BATT
(%)
3.43.53.63.73.83.9
50
60
70
80
90
100
40
4.2 3.0
1.6mA/LED
16mA/LED
LEDs HAVE MISMATCHED V
F
EFFICIENCY vs. Li+ BATTERY VOLTAGE
(DRIVING SIX LEDs)
MAX8647/48 toc06
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
EFFICIENCY P
LED
/P
BATT
(%)
3.43.53.63.73.83.9
50
60
70
80
90
100
40
4.2 3.0
6.4mA/LED
20.8mA/LED
LEDs HAVE MISMATCHED V
F
INPUT CURRENT vs. INPUT VOLTAGE
(DRIVING SIX LEDs)
MAX8647/48 toc07
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
3.73.2
20
40
60
80
100
120
140
160
180
200
0
2.7 4.2
LEDs HAVE MISMATCHED V
F
I
LED
= 16mA
I
LED
= 20.8mA
I
LED
= 6.4mA
I
LED
= 1.6mA
INPUT CURRENT vs. Li+ BATTERY
VOLTAGE (DRIVING SIX LEDs)
MAX8647/48 toc08
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
INPUT CURRENT (mA)
3.53.6 3.43.73.83.9
20
40
60
80
100
120
140
160
180
200
0
4.2 3.0
1.6mA/LED
6.4mA/LED
16mA/LED
20.8mA/LED
LEDs HAVE MISMATCHED V
F
INPUT CURRENT
vs. INPUT VOLTAGE (RGB MODULE)
MAX8647/48 toc09
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
3.73.2
10
20
30
40
50
60
70
80
90
100
0
2.7 4.2
I
LED
= 20.8mA
I
LED
= 16mA
I
LED
= 4.8mA
I
LED
= 1.6mA
RGB MODULE: LUMEX SML-LX3632SISUGSBC
INPUT CURRENT vs. Li+ BATTERY
VOLTAGE (RGB MODULE)
MAX8647/48 toc10
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
INPUT CURRENT (mA)
3.53.6 3.43.73.83.9
10
20
30
40
50
60
70
80
90
100
0
4.2 3.0
1.6mA/LED
6.4mA/LED
16mA/LED
20.8mA/LED
RGB MODULE: LUMEX SML-LX3632SISUGSBC
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE (DRIVING SIX WHITE LEDs)
MAX8647/48 toc11
SUPPLY VOLTAGE (V)
INPUT RIPPLE VOLTAGE (mV
RMS
)
3.73.2
2
4
6
8
10
12
14
16
0
2.7 4.2
20.8mA/LED
16mA/LED
6.4mA/LED
1.6mA/LED
LEDs HAVE
MISMATCHED V
F
15.0
15.6
15.4
15.2
16.0
15.8
16.8
16.6
16.4
16.2
17.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
LED CURRENT MATCHING
vs. INPUT VOLTAGE (16mA/LED)
MAX8647/48 toc12
INPUT VOLTAGE (V)
LED CURRENT (mA)
Typical Operating Characteristics (continued)
(V
IN
= 3.6V, V
EN_
= V
IN
, circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
MAX8647/MAX8648
Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
6 _______________________________________________________________________________________
0
10
5
20
15
25
30
-40 10-15 35 60 85
LED CURRENT vs. TEMPERATURE
MAX8647/48 toc13
TEMPERATURE (
°
C)
LED CURRENT (mA)
400ns/div
1x MODE OPERATING WAVEFORMS
(V
IN
= 4V)
V
IN
I
IN
100mA/div
AC-COUPLED
100mV/div
20mA/div
MAX8647/48 toc14
I
LED
0A
0A
ALL LEDs ON
I
LED
= 24mA
400ns/div
1.5x MODE OPERATING WAVEFORMS
(V
IN
= 3V)
V
IN
I
IN
100mA/div
AC-COUPLED
100mV/div
20mA/div
MAX8647/48 toc15
I
LED
0A
0A
ALL LEDs ON
I
LED
= 24mA
1ms/div
STARTUP AND SHUTDOWN
(MAX8648)
V
EN_
V
IN
I
IN
200mA/div
AC-COUPLED
20mV/div
2V/div
MAX8647/48 toc16
I
LED5
0A
0A
2V/div
ENA = ENB = ENC
10ms/div
SINGLE-WIRE PULSE DIMMING
(MAX8648)
V
EN_
20mA/div
MAX8647/48 toc17
TOTAL I
LED5
0A
5V/div
OPERATING IN 1x
MODE, ALL 6 LEDs
OPERATING
1ms/div
LINE-TRANSIENT RESPONSE
(V
IN
= 4.3V TO 3.8V TO 4.3V)
V
IN
I
IN
24mA
20mA/div
200mA/div
MAX8647/48 toc18
I
LED6
0A
4.3V
3.8V
1ms/div
LINE-TRANSIENT RESPONSE WITH MODE
CHANGE (V
IN
= 3.8V TO 3.4V TO 3.8V)
V
IN
I
IN
24mA
20mA/div
200mA/div
MAX8647/48 toc19
I
LED6
0mA
3.8V
3.4V
Typical Operating Characteristics (continued)
(V
IN
= 3.6V, V
EN_
= V
IN
, circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
P1-P3P4-P6P7-P9P10-P12P13-P15

MAX8648ETE+

Mfr. #:
Buy MAX8648ETE+
Manufacturer:
Maxim Integrated
Description:
LED Lighting Drivers Charge Pump for 6 White/RGB LEDs
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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