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MP2370DJ-LF-P

P1-P3P4-P6P7-P9P10-P11
MP2370 – 1.2A, 24V, 1.4MHz STEP-DOWN WHITE LED DRIVER
MP2370 Rev. 1.03 www.MonolithicPower.com 4
6/29/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25C, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
Feedback Voltage V
FB
4.5V
V
IN
24V
0.145 0.155 0.165 V
Feedback Current I
FB
V
FB
= 0.15V 0.1 A
Switch-On Resistance
(4)
R
DS
(
ON
)
0.35
Switch Leakage V
EN
= 0V, V
SW
= 0V 10 A
Current Limit
(4)
1.8 A
Oscillator Frequency f
SW
V
FB
= 0.13V 1.2 1.4 1.7 MHz
Fold-back Frequency V
FB
= 0V 700 KHz
Maximum Duty Cycle V
FB
= 0.13V 87 %
Minimum On-Time
(4)
t
ON
100 ns
Under Voltage Lockout Threshold Rising 2.5 2.8 3.1 V
Under Voltage Lockout Threshold Hysteresis 150 mV
EN Input Low Voltage 0.4 V
EN Input High Voltage 1.5 V
EN Input Current
V
EN
= 2V 2.1
A
V
EN
= 0V 0.1
Minimum PWM DIM On-Time on EN Pin T
MIN_ON
V
OUT
=4.5V 25C
200 s
V
OUT
=4.5V
-40C ~125C
(5)
240 s
Supply Current (Shutdown) I
S
V
EN
= 0V 0.1 1.0 A
Supply Current (Quiescent) I
Q
V
EN
= 2V, V
FB
=
0.2V
0.8 1.0 mA
Thermal Shutdown
(4
150 °C
Note:
4) Guaranteed by design.
5) Not tested in production, guaranteed by over -temperature correlation.
MP2370 – 1.2A, 24V, 1.4MHz STEP-DOWN WHITE LED DRIVER
MP2370 Rev. 1.03 www.MonolithicPower.com 5
6/29/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
PIN FUNCTIONS
TSOT-6
Pin #
QFN-6
Pin #
Name Description
1 6 BST
Bootstrap. A capacitor is connected between SW and BS pins to form a floating
supply across the power switch driver. This capacitor is needed to drive the
power switch’s gate above the supply voltage.
2 5 GND
Ground. This pin is the voltage reference for the regulated output voltage. For
this reason care must be taken in its layout. This node should be placed outside
of the D1 to C1 ground path to prevent switching current spikes from inducing
voltage noise into the part.
3 4 FB Current Sense Feedback Voltage. Its internal threshold is 0.15V.
4 3 EN On/Off Control Input. Pull EN above 1.2V to turn the device on.
5 2 IN
Supply Voltage. The MP2370 operates from a +4.5V to +24V unregulated input.
Input Capacitor is needed to prevent large voltage spikes from appearing at the
input.
6 1 SW Switch Output.
MP2370 – 1.2A, 24V, 1.4MHz STEP-DOWN WHITE LED DRIVER
MP2370 Rev. 1.03 www.MonolithicPower.com 6
6/29/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
TYPICAL PERFORMACE CHARACTERISTICS
Circuit as Figure 1, V
IN
= 12V, Load: one 3 Watt White LED, unless otherwise noted.
Enable Start Up Enable Turn Off Steady State Operation
40us/div 40us/div 400nS/div
V
SW
10V/div
V
EN
5V/div
I
LED
0.5A/div
V
SW
10V/div
V
EN
5V/div
I
LED
0.5A/div
V
SW
10V/div
V
OUT
(AC)
20mV/div
I
INDUCTOR
0.5A/div
8070 90
Output Short Output Short Entry Output Short Recovery
1us/div 4us/div 4us/div
V
SW
10V/div
V
SW
10V/div
V
SW
10V/div
V
OUT
2V/div
V
OUT
2V/div
I
LED
0.5A/div
I
LED
0.5A/div
I
INDUCTOR
0.5A/div
Line Regulation
V
OUT
= 3.3V
400us/div
V
EN
5V/div
Line Regulation
V
OUT
= 3.3V
Current Limit vs
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.8
1.6
2.0
10 20 40 6030 50
INDUCTOR PEAK CURRENT(A)
DUTY(%)
V
OUT
2V/div
V
SW
10V/div
0.5A/div
I
LED
PWM DIMMING DUTY(%)
0
20
40
60
80
100
OUTPUT CURRENT(A)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.8
0.7
0.9
I
Duty Cycle
P1-P3P4-P6P7-P9P10-P11

MP2370DJ-LF-P

Mfr. #:
Buy MP2370DJ-LF-P
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers 1.2A, 24V, 1.4MHz Step-Down WLED Drvr
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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