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參數(shù)資料
| 型號： | MP1521 |
| 廠商： | Monolithic Power Systems, Inc. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | High Efficiency White LED Driver |
| 中文描述： | 高效率白光LED驅(qū)動器 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 175K |
| 代理商： | MP1521 |
MP1521
High Efficiency
White LED Driver
MP1521 Rev 2.7 10/06/04
www.monolithicpower.com
3
Monolithic Power Systems
Pin Description
MSOP10
QFN16
Table 1: MP1521 MSOP10 and QFN16 Pin Assignments
Part Marking: MP1521EK
Part Marking: A1xx
MSOP
Pin #
1
QFN
Pin#
16
Pin
Name
IN
Pin Function
Input supply pin. It can be connected to the regulator’s input supply, or to the
output for boot-strapped operation (boot-strapped operation is required for V
IN
of
less than 3V).
2
2
EN
Regulator On/Off control input. Logic high (V
EN
>1V) turns on IC, logic low puts it
into low current shutdown mode. Place a 100K
resistor in series with EN if it is
connected to a voltage greater than 10V.
1.23V reference used for setting the analog control voltage at BRT input. This
reference can supply up to 200
μ
A to an external load.
Do not
connect any
bypass capacitors to this pin. It is internally compensated.
Analog or PWM input for controlling LED brightness. When used in analog
mode, apply a DC voltage of 0.3 to 1.2V. This input voltage is attenuated by 1/3
to set the voltage across sense resistors at FB1, FB2, and FB3. Maximum
brightness (20mA) occurs with 1.2V applied. To control brightness in PWM
mode, apply a PWM square wave with a minimum voltage less the 0.18V and a
maximum greater than 1.2V. When a voltage less than 0.18V is applied to this
pin, the output switch is turned off. The regulator operates at maximum
brightness when more than 1.2V is applied. The frequency of the PWM signal
must be between 100 to 400 Hz.
Feedback input for measuring voltage across current-sense resistor that is in
series with LED string. Unused feedback pins must be connected to any used
feedback pin.
3
4
REF
4
5
BRT
5
6
7
8
7
8
9
10
FB3
FB2
FB1
OLS
Open Load Shutdown pin senses regulator output voltage to protect IC during
open load operation. When this pin’s voltage exceeds 28V, the output switch is
shut off. The output switch remains off until the IC is reset by cycling the enable
pin (EN) or input supply (IN) pin.
Signal and power ground. Connect directly to ground plane.
Output switch pin, power DMOS low-side switch.
No Connect
9
10
-
11, 12
14
1, 3, 6,
13, 15
GND
SW
N/C
SW
GND
OLS
FB1
FB2
IN
EN
REF
BRT
FB3
1
2
3
4
5
10
9
8
7
6
NC
EN
NC
REF
Top
View
GND
GND
OLS
FB1
B
N
F
F
I
N
S
N
1
2
3
4
5
6
7
8
12
11
10
9
1
1
1
1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP1521_R2.7W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Efficiency White LED Driver |
| MP1521EK | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:High Efficiency White LED Driver |
| MP1521EK-LF | 制造商:Monolithic Power Systems 功能描述:15 LED, 2.5 - 25Vin Switch Driver |
| MP1521EK-LF-P | 功能描述:電源開關(guān) IC - 配電 15 LED, 2.5 - 25Vin Switch Driver RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MP1521EK-LF-Z | 功能描述:電源開關(guān) IC - 配電 15 LED, 2.5 - 25Vin Switch Driver RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
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