MAX1570ETE+T Maxim Integrated Products, MAX1570ETE+T Datasheet - Page 5

• Manufacturer Part Number: MAX1570ETE+T
• Description: IC LED DRVR WHITE BCKLGT 16-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX1570ETE+T

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck), Step-Up (Boost), Switched Capacitor (Charge Pump)
• Number Of Outputs: 5
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Number Of Segments: 5
• Low Level Output Current: 30 mA
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Supply Current: 3.5 mA
• Maximum Power Dissipation: 1349 mW
• Maximum Operating Temperature: + 85 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: Details

(EN1 = EN2 = IN, C
TYPICAL OPERATING WAVEFORM
20
18
16
14
12
10
8
6
4
2
0
2.5
LED CURRENT vs. SUPPLY VOLTAGE
EN1 = V
EN1 = GND, EN2 = V
3.0
EN1 = EN2 = V
IN 1X MODE
IN
, EN2 = GND
2µs/div
White LED Current Regulator with 1x/1.5x
SUPPLY VOLTAGE (V)
3.5
IN
_______________________________________________________________________________________
= 1µF, C1 = C2 = 1µF, C
IN
IN
4.0
DIMMING RESPONSE USING
MAX1570 toc13
4.5
PWM INTO EN1
100µs/div
5.0
I
AC-COUPLED
10mA/div
V
AC-COUPLED
1mV/div
V
AC-COUPLED
1mV/div
IN
IN
OUT
5.5
MAX1570 toc16
IN 1.5X MODE (I
OUT
12.0
11.9
11.8
11.7
11.6
11.5
11.4
11.3
11.2
11.1
11.0
Typical Operating Characteristics (continued)
TYPICAL OPERATING WAVEFORM
-40
= 4.7µF, R
High-Efficiency Charge Pump
I
15mA TO 5mA
5mA/div
V
AC-COUPLED
500mV/div
EN1
0 TO 2V
2V/div
LED CURRENT vs. TEMPERATURE
LED
OUT
(V
-15
IN
LOAD
400ns/div
= 3.3V, R
SET
TEMPERATURE (°C)
10
= 90mA, V
= 9.09kΩ, T
SET
35
= 7.5kΩ)
IN
EN1 = IN
EN2 = GND
MAX1570 toc14
= 3.6V)
A
60
= +25°C, unless otherwise noted.)
LINE-TRANSIENT RESPONSE
I
AC-COUPLED
10mA/div
V
AC-COUPLED
20mV/div
V
AC-COUPLED
5mV/div
IN
IN
OUT
85
100µs/div
30
25
20
15
10
5
0
STARTUP RESPONSE (V
5.0
(5 LEDs AT 15mA/LED)
MAX1570 toc17
LED CURRENT vs. R
7.5
400µs/div
R
I
15mA
5mA/div
V
AC-COUPLED
500mV/div
V
4 TO 3.6V
500mV/div
LED
SET
OUT
IN
10.0
(kΩ)
IN
= 3.3V)
MAX1570 toc15
SET
12.5
I
50mA/div
V
2V/div
IN
OUT
15.0
5