MAX8678ETE+ Maxim Integrated Products, MAX8678ETE+ Datasheet - Page 4

• Manufacturer Part Number: MAX8678ETE+
• Description: IC LED DRVR WHITE BCKLGT 16-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX8678ETE+

• Constant Current: Yes
• Topology: PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 2.7 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
• Low Level Output Current: 0.6 A
• High Level Output Current: 1.6 A
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Supply Current: 3 mA
• Maximum Power Dissipation: 1398 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

White LED Charge Pump with
1.1W Audio Amplifier
(V
4
IN
0.001
-25dB
-35dB
-45dB
-55dB
-65dB
-75dB
-85dB
-95dB
0.01
500
400
300
200
100
0.1
_______________________________________________________________________________________
0
= 3.2V, R
POWER DISSIPATION vs. OUTPUT POWER
10
0
GAIN = 18dB
V
GAIN = 3dB
COMMON-MODE REJECTION RATIO
RIPPLE
TOTAL HARMONIC DISTORTION +
OUTPUT POWER = 50mW
100
OUTPUT POWER = 300mW
100mV
100
L
NOISE vs. FREQUENCY
100
200
= 8Ω, T
OUTPUT POWER (mW)
vs. FREQUENCY
OUTPUT POWER = 150mW
FREQUENCY (Hz)
P-P
FREQUENCY (Hz)
300 400
1000
A
1k
= +25°C, unless otherwise noted.)
500
10,000
600 700
MAX8678 toc07
10k
100,000
-105dB
-125dB
0.001
-25dB
-35dB
-45dB
-55dB
-65dB
-75dB
-85dB
-95dB
0.01
100
0.1
1.2
1.0
0.8
0.6
0.4
0.2
10
1
0
0
4
OUTPUT POWER vs. LOAD RESISTANCE
GAIN = 3dB
GAIN = 18dB
V
POWER-SUPPLY REJECTION RATIO
RIPPLE
TOTAL HARMONIC DISTORTION +
6
NOISE vs. OUTPUT POWER
0.2
18mV
100
LOAD RESISTANCE (Ω)
OUTPUT POWER (W)
f
vs. FREQUENCY
IN
P-P
8
FREQUENCY (Hz)
= 1kHz
0.4
10
f
IN
THD+N = 1%
= 100kHz
1k
Typical Operating Characteristics
0.6
f
IN
THD+N = 10%
12
= 10kHz
0.8
14
MAX8678 toc08
10k
1.0
16
V
OUT+
V
- V
ENAMP
2000
1000
V
V
25dB
20dB
15dB
10dB
OUT+
OUT-
OUT-
5dB
0dB
0
2.5
10
OUTPUT POWER vs. SUPPLY VOLTAGE
GAIN = 18dB
AMPLIFIER GAIN AND PHASE
THD+N = 10%
100
AMPLIFIER STARTUP
SUPPLY VOLTAGE (V)
vs. FREQUENCY
AND SHUTDOWN
3.5
FREQUENCY (Hz)
4ms/div
1k
THD+N = 1%
4.5
10k
MAX8678 toc06
MAX8678 toc09
100k
5.5
1V/div
1V/div
100mV/div
2V/div
0°
-30°
-60°
-90°