MT7200 Datasheet PDF - Maxic Technology
| Part Number | MT7200 | |
| Description | 350mA LED driver | |
| Manufacturers | Maxic Technology | |
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There is a preview and MT7200 download ( pdf file ) link at the bottom of this page. Total 15 Pages | ||
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MT7200
350mA LED driver with internal switch
DESCRIPTION
The MT7200 is a continuous mode inductive
step-down converter, designed for driving
single or multiple series connected LEDs
efficiently from a voltage source higher than
the LED voltage. The device operates from an
input supply between 7~40V and provides an
externally adjustable output current of up to
350mA. Depending upon supply voltage and
external components, this can provide up to 8
watts of output power.
The MT7200 includes the output switch and a
high-side output current sensing circuit, which
uses an external resistor to set the nominal
average output current.
FEATURES
Pass 4KV ESD test
Simple low parts count
350mA output current
Single pin on/off and brightness control
using DC voltage or PWM
Internal PWM filter
Soft-start
High efficiency (up to 97%)
Wide input voltage range: 7V to 40V
Output shutdown
Up to 1MHz switching frequency
Inherent open-circuit LED protection
Typical 4% output current accuracy
APPLICATION CIRCUIT
Output current can be adjusted above, or
below the set value, by applying an external
control signal to the 'ADJ' pin.
The ADJ pin will accept either a DC voltage or
a PWM waveform. Depending upon the control
frequency, this will provide either a continuous
or a gated output current. The PWM filter
components are contained within the chip.
The PWM filter provides a soft-start feature by
controlling the rise of input/output current. The
soft-start time can be increased using an
external capacitor from the ADJ pin to ground.
Applying a voltage of 0.2V or lower to the ADJ
pin turns the output off and switches the
device into a low current standby state.
The device is assembled in a
SOT23-5/SOT89-5 pin package.
APPLICATION
Low voltage halogen replacement LEDs
Automotive lighting
Low voltage industrial lighting
LED back-up lighting
Illuminated signs
PIN CONFIGURATION
MT7200 Rev. 1.1
LX 1
5 VIN
GND 2
SOT89-5
ADJ 3
(Top view)
www.maxictech.com
Copyright © 2008 Maxic Technology Corporation
4 ISENSE
Page 1
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MT7200
350mA LED driver with internal switch
Typical operating conditions
Efficiency Vs. Vin(L=47uH)
100.00%
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
65.00%
60.00%
5
10 15 20 25 30
Vin(V)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
DutyCycle Vs. Vin(L=47uH)
100.00%
90.00%
80.00%
70.00%
60.00%
50.00%
40.00%
30.00%
20.00%
10.00%
0.00%
5
10 15 20 25 30
Vin(V)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
Frequency Vs. Vin(L=47uH)
1600
1400
1200
1000
800
600
400
200
0
5 10 15 20 25 30
Vin(V)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
Output current variation Vs.
10.00% Vin(L=47uH)
8.00%
6.00%
4.00%
2.00%
0.00%
5
‐2.00%
10 15 20 25 30
‐4.00%
‐6.00%
Vin(V)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
Efficiency Vs. Vin(L=100uH)
100.00%
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
65.00%
60.00%
5
10 15 20 25 30
Vin(V)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
DutyCycle Vs. Vin(L=100uH)
100.00%
90.00%
80.00%
70.00%
60.00%
50.00%
40.00%
30.00%
20.00%
10.00%
0.00%
5
10 15 20 25 30
Vin(V)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
MT7200 Rev. 1.1
www.maxictech.com
Copyright © 2008 Maxic Technology Corporation
Page 5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for MT7200 electronic component. |
| Information | Total 15 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ MT7200.PDF Datasheet ] | |
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