파트넘버.co.kr EV0005 데이터시트 PDF


EV0005 반도체 회로 부품 판매점

High Efficiency White LED Driver



ETC 로고
ETC
EV0005 데이터시트, 핀배열, 회로
Monolithic Power Systems
MP1521
High Efficiency
White LED Driver
General Description
The MP1521 is a constant-current Boost
Regulator. This IC has three individual
current-sensing feedbacks, which are ideal for
driving multiple strings of series connected
LEDs. The OLS pin is designed for detecting
loose or open LED connections.
The IC uses a peak current, constant minimum
off-time architecture. The feedback pins
measure voltage across sense resistors in
series with the LED strings. When supplying a
bias current of 20mA, the voltage drop across
the sense resistor is only 0.4V to minimize
power loss. Either a DC voltage or a PWM
signal at the BRT/PWM input can control the
LED brightness.
The MP1521 has an on board power MOSFET
switch that is protected by current limit, open
load shutdown, thermal shutdown, and under
voltage lockout.
Ordering Information
Part Number
MP1521EK
Package
MSOP10
Temperature
-20° to +85°C
MP1521EQ
QFN16 (3x3) -20° to +85°C
EV0005
MP1521EK Evaluation Board
EV0021
MP1521EQ Evaluation Board
For Tape & Reel, add suffix –Z (i.e., MP1521EK–Z)
For Lead Free, add suffix –LF (i.e., MP1521EK–LF–Z)
Features
ƒ On Board Power MOSFET
ƒ Drive 9 White LEDs from 2.7V Input
ƒ Drive 15 White LEDs from 5V Input
ƒ Up to 90% Efficiency
ƒ Over 80mA Output Current Capacity
ƒ Open Load Shutdown
ƒ Low Current Sensing Feedback Voltage
ƒ Up to 3 String Current Sensing Feedback
ƒ Analog and Digital PWM Brightness Control
ƒ UVLO, Thermal Shutdown
ƒ Soft Start
ƒ Internal Current Limit
ƒ Available in Compact MSOP10 and
Tiny 3 mm x 3 mm QFN16 Package
ƒ Evaluation Boards Available
Applications
ƒ Handheld Computers, Cell phones, PDAs,
Digital and Video Cameras, Small LCD
Displays
ƒ Li Ion and NiMH Battery Applications
Typical Application Circuit (One String of Six (6) LEDs)
ON
OFF EN
1 IN
MP1521
2 EN
SW 10
GND 9
D1
COUT
L1
3 REF
BRT/
PWM
4 BRT/PWM
OLS 8
FB1 7
White LEDs
5 FB3
FB2 6
VIN
CIN
GND
Efficiency vs LED current, 1 string of 6
Using Toko D62CB 47µH Inductor
100
90 VIN = 5V
80 VIN = 4V
70 VIN = 3V
60
50
5 10 15 20 25
LED Current (mA)
MP1521 Rev 2.7 10/06/04
www.monolithicpower.com
1


EV0005 데이터시트, 핀배열, 회로
Monolithic Power Systems
MP1521
High Efficiency
White LED Driver
Absolute Maximum Ratings
Supply Voltage (VIN)
28V
Switch Voltage to GND
-0.5V to 28V
VEN, VREF, VBRT, VFB1, VFB2, VFB3
–0.3V to 6V
Storage Temperature
-55°C to +150°C
Recommended Operating Conditions
Supply Voltage (VIN)
2.7V to 25V
Operating Temperature
-20°C to +85°C
Switch Voltage to GND
-0.5V to 25V
Package Thermal Characteristics
Thermal Resistance, ΘJA (MSOP10)
Thermal Resistance, ΘJA (QFN16)
150°C/W
60°C/W
Electrical Characteristics (VIN = 5.0V, TA = 25°C unless specified otherwise)
Parameters
Symbol
Condition
Min Typ Max Units
Supply Current (shutdown)
Supply Current (quiescent)
Minimum Off Time, normal
operation
Minimum Off Time, start-up
(Note 1)
UVLO
Under Voltage Lockout
Enable
Threshold
Hysterisis
Leakage Current
Open Load Shutdown
Threshold
Leakage Current
Reference
Output Voltage
Load Regulation
Line Regulation
Feedback Comparator
Threshold
Hysterisis (Note 2)
FB Input Bias Current
PWM Mode
Output-Off Threshold
BRT Input Bias
BRT Full Scale Threshold
(Note 3)
IIN (OFF)
IIN (ON)
tOFF (NORMAL)
tOFF (START)
VEN<0.4V
VEN >1.5V, VBRT=0V, VFB=0V
VEN >1.5V, VBRT =0.6V
VFB =0
VEN >1.5V, VBRT =0.6V,
VFB =0V
400
1.5
VIN RISING
VIN FALLING
2.1
1.9
0.8
VEN=3V
Measured at OLS Pin
VOLS=15V
VOLS=25V
IREF=0A
IREF=0 to 100µA
VIN =3 to 15V, IREF=0A
VBRT =1.2V
VBRT =1.2V
VFB=0.2V
VBRT=0.6V
26
1.20
380
-150
0.18
-100
13
550 700
500 700
2.4
2.6
2.4
1.0 2.0
60
1
29
1
45 70
1.235 1.27
2.5 5
2.5 5
400 420
30
-50 0
0.26
-30 0
1.2
µA
µA
nS
µS
V
V
V
mV
µA
V
µA
µA
V
mV
mV
mV
mV
nA
V
nA
V
Output Switch
Switch On Resistance (Note 2) RON
Switch Current Limit
Leakage Current
Thermal Shutdown (Note 2)
VIN=5.0V
VSW=25V
0.5 0.6
300 400
5
160
mA
µA
°C
Notes:
1) First 64 pulses after EN switches high.
2) Guaranteed by design.
3) The output current is off when BRT is driven below the output-off threshold and full-scale when driven above the full-scale
threshold. To PWM the output drive BRT above and below these thresholds.
MP1521 Rev 2.7 10/06/04
www.monolithicpower.com
2




PDF 파일 내의 페이지 : 총 2 페이지

제조업체: ETC

( etc )

EV0005 led

데이터시트 다운로드
:

[ EV0005.PDF ]

[ EV0005 다른 제조사 검색 ]




국내 전력반도체 판매점


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877

[ 홈페이지 ]

IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈

( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )

전력반도체 문의 : 010-3582-2743



일반적인 전자부품 판매점


디바이스마트

IC114

엘레파츠

ICbanQ

Mouser Electronics

DigiKey Electronics

Element14


관련 데이터시트


EV0005

High Efficiency White LED Driver - ETC



EV0007

2A MP1580 Step Down Switch Mode Converter - MPS