MAX16820ATT+T Maxim Integrated Products, MAX16820ATT+T Datasheet - Page 4

• Manufacturer Part Number: MAX16820ATT+T
• Description: IC LED DRIVER HIGH BRIGHT 6-TDFN
• Manufacturer: Maxim Integrated Products
• Type: HBLED Driverr

Specifications of MAX16820ATT+T

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive
• Type - Secondary: *
• Frequency: 2MHz
• Voltage - Supply: 4.5 V ~ 28 V
• Voltage - Output: 4 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 6-TDFN Exposed Pad
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): No
• Low Level Output Current: 1000000 uA (Typ)
• High Level Output Current: 50000 uA (Typ)
• Operating Supply Voltage: 4.5 V to 28 V
• Maximum Supply Current: 425 uA
• Maximum Power Dissipation: 1454 mW
• Maximum Operating Temperature: + 125 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
• Other names: MAX16820ATT+T; MAX16820ATT+TTR

2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
(V
noted.)
4
IN
100
_______________________________________________________________________________________
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
= V
95
90
85
80
75
70
65
60
5.0
5
DIM
7.5
= 12V, C
LED 4
10
10.0 12.5 15.0
EFFICIENCY vs. V
PWM DIMMING AT 200Hz
V
15
(10% DUTY CYCLE)
VCC
CC
V
V
IN
IN
vs. V
(V)
17.5 20.0
(V)
= 1µF, R
1ms/div
20
IN
V
1 LED MAX16819
IN
IN
22.5
L = 47µH
= 12V, L = 47µH,
25
SENSE
I
LED
25.0
= 0
MAX16819 toc07
27.5
30
= 0.5Ω connected between IN and CSN. Typical values at T
V
2V/div
0V
I
200mA/div
0A
LED
DIM
1500
1400
1300
1200
1100
1000
5.40
5.39
5.38
5.37
5.36
5.35
5.34
5.33
5.32
5.31
5.30
800
700
600
500
400
300
200
100
900
0
-40
4
-25
LED 1
DRV SWITCHING FREQUENCY
-10 5 20 35 50
8
V
CC
LED 2
TEMPERATURE (°C)
12
vs. TEMPERATURE
vs. V
V
LED 3
IN
16
(V)
Typical Operating Characteristics
IN
V
LED 4
IN
65 80
= 24V
20
LED 5
V
L = 47µH
V
DIM
95
IN
24
= 12V
= 0V
110
125
28
PWM DIMMING AT 200Hz
-0.5
-1.0
-1.5
-2.0
300
250
200
150
100
2.0
1.5
1.0
0.5
(90% DUTY CYCLE)
50
0
0
4.5
5
1ms/div
LED CURRENT VARIATION vs. V
A
LED 1
LED 3
= +25°C, unless otherwise
8.5
SUPPLY CURRENT vs. V
10
V
1 LED MAX16819
IN
= 12V, L = 47µH,
12.5
15
MAX16819 toc08
LED 2
V
V
16.5
IN
IN
LED 4
(V)
(V)
I
L = 47µH
LED(NOMINAL)
20
20.5
V
2V/div
0V
I
200mA/div
0A
LED
DIM
LED 5
V
25
IN
24.5
= 400mA
DIM
IN
= 0V
28.5
30