MAX16832AASA+ Maxim Integrated Products, MAX16832AASA+ Datasheet - Page 5

• Manufacturer Part Number: MAX16832AASA+
• Description: IC LED DRIVER HIGH BRIGHT 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: HBLED Driverr

Specifications of MAX16832AASA+

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 2MHz
• Voltage - Supply: 6.5 V ~ 65 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width) Exposed Pad, 8-eSOIC. 8-HSOIC
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 700mA
• Internal Switch(s): Yes
• Operating Supply Voltage: 6 V to 65 V
• Maximum Supply Current: 1.5 mA
• Maximum Power Dissipation: 1860.5 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Integrated MOSFET and High-Side Current Sense
The MAX16832A/MAX16832C are step-down, constant-
current, HB LED drivers. These devices operate from a
+6.5V to +65V input voltage range. The maximum output
is 1A, if the part is used at temperatures up to T
+105°C, or 700mA, if it is used up to T
high-side current-sense resistor sets the output current
(V
noted.)
IN
= V
PIN
5, 6
—
1
2
3
4
7
8
DIM
= 48V, R
0.7
0.6
0.5
0.4
0.3
0.2
0.1
TEMP_I
_______________________________________________________________________________________
NAME
SENSE
PGND
GND
-40
DIM
CS
LX
EP
IN
2MHz, High-Brightness LED Drivers with
-25
Detailed Description
= 0.3Ω, L = 220µH (connected between IN and CS). Typical values are at T
-10
V
vs. TEMPERATURE
5
IN
TEMPERATURE (°C)
Current-Sense Input. Connect a resistor between IN and CS to program the LED current.
Positive Supply Voltage Input. Bypass with a 1µF or higher value capacitor to GND.
Ground
Power Ground
Switching Node
Logic-Level Dimming Input. Drive DIM low to turn off the current regulator. Drive DIM high to
enable the current regulator.
Thermal Foldback Control and Linear Dimming Input. Bypass with a 0.01µF capacitor to GND if
thermal foldback or analog dimming is used. See the Thermal Foldback section.
Exposed Pad. Connect EP to a large-area ground plane for effective power dissipation. Do not use
as the IC ground connection.
= 48V
20
LX
35
RDSON
V
50
IN
= 65V
65
V
IN
= 6.5V
A
80
= +125°C. A
Typical Operating Characteristics (continued)
95
110
125
A
=
and a dedicated PWM dimming input enables pulsed
LED dimming over a wide range of brightness levels.
A high-side current-sensing scheme and an on-board
current-setting circuitry minimize the number of exter-
nal components while delivering LED current with ±3%
accuracy, using a 1% sense resistor. See Figure 1 for a
functional diagram.
FUNCTION
30.0
29.5
29.0
28.5
28.0
27.5
27.0
26.5
26.0
25.5
25.0
-40
V
-25
IN
= 48V
-10
vs. TEMPERATURE
5
TEMPERATURE (°C)
20
I
TEMP_I
35
50
A
65
= +25°C, unless otherwise
Pin Description
80
95
110
125
5