MAX17149ETE+ Maxim Integrated Products, MAX17149ETE+ Datasheet - Page 7

• Manufacturer Part Number: MAX17149ETE+
• Description: LED Drivers 6-String WLED Driver
• Manufacturer: Maxim Integrated Products

Specifications of MAX17149ETE+

• Operating Supply Voltage: 3 V to 26 V
• Maximum Supply Current: 4 mA
• Maximum Power Dissipation: 1176 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFN-16
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(Circuit of Figure 1. V
1.0
0.8
0.6
0.4
0.2
0
(BRIGHTNESS = 100%, LED OPEN ON FB1)
10
(V
(V
BETWEEN STRINGS vs. BRIGHTNESS
IN
IN
MAX. UNBALANCE
20
20mA
20mA
LED OPEN FAULT PROTECTION
= 12V, f
= 9V ↔ 21V, BRIGHTNESS = 100%)
MAXIMUM UNBALANCE RATE
9V
LINE TRANSIENT RESPONSE
IN
RATE (%)
30
= 12V, T
40
BRT
BRIGHTNESS (%)
Low-Cost, 6-String WLED Drivers with
100µs/div
50
2ms/div
= 200Hz, I
=
A
I
FB_
60
= +25°C, unless otherwise noted.)
-I
21V
I
FB(AVG) MAX
FB(AVG)
70
LED
80
31.8V
MAX17129 toc12
MAX17129 toc10
= 20mA)
90
Quick-PWM Step-Up Converter
100
Typical Operating Characteristics (continued)
V
10V/div
V
(AC-COUPLED)
500mV/div
0V
INDUCTOR
CURRENT
500mA/div
0A
I
20mA/div
0mA
V
1V/div
0V
V
10V/div
0V
V
10V/div
I
10mA/div
0mA
FB1
FB2
IN
OUT
FB1
FB2
OUT
0.8
0.7
0.6
0.5
0.4
0.3
0.2
6
(V
(I
IN
LED
MAX. UNBALANCE
LED SHORT FAULT PROTECTION
20mA
20mA
20mA
21V
= 21V ↔ 9V, BRIGHTNESS = 100%)
MAXIMUM UNBALANCE RATE
LINE TRANSIENT RESPONSE
9
RATE (%)
= 20mA AT 100% BRIGHTNESS)
3 LEDS SHORT ON FB1)
(BRIGHTNESS = 100%,
vs. INPUT VOLTAGE
BETWEEN STRINGS
12
INPUT VOLTAGE (V)
200µs/div
2ms/div
15
=
I
FB_
18
-I
I
FB(AVG) MAX
FB(AVG)
9V
21
MAX17129 toc13
MAX17129 toc11
24
V
10V/div
V
(AC-COUPLED)
200mV/div
0V
INDUCTOR
CURRENT
500mA/div
0A
I
20mA/div
0mA
V
10V/div
0V
I
20V/div
0mA
I
20mA/div
0mA
FB1
FB1
FB2
IN
OUT
FB1
7