HM7502MR [HMSEMI]
2-channel Constant Current Regulator;
| 型号： | HM7502MR |
| 厂家： | 
H&M Semiconductor |
| 描述： | 2-channel Constant Current Regulator |
| 文件： | 总9页 (文件大小：477K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HM7502
©1999~2014
2-channel Constant Current Regulator
HM7502
2-channel Constant Current Regulator
INTRODUCTION
FEATURE HIGHLIGHTS
The HM7502 is a 2-channel LED driver, designed for current
regulation. It may be used in various current regulation circuits,
especially suitable for LED applications. It lets LEDs work
under stable current and avoid brightness unstable caused by
current change, while its low voltage can reduce power
consumption.
•
•
•
•
•
•
•
•
•
•
Wide operation supply voltage range: 2.5V ~ 40V
Wide output voltage range: 2.5V~40V
30mA to 60mA /per channel sink current
Accurate sink current: ± 5%
VDD pin as OE function: up to 100KHz frequency
Negative temperature coefficient: ± 500ppm/ oC
Less than ±0.5%/V load regulation
–40 oC ~+85 oC operation temperature range
High temperature protection: 95 oC ~ 155oC
Pb-free and green package: SOT89-5, SOT23-5
The connection of the VDD power pin may also be used for
brightness control of LEDs via PWM signals; therefore suitable
for applications that need brightness adjustment.
The connection of REXT pin can be used for the control of
output current, to control and drive more LEDs. When REXT is
open, VCH1, VCH2 pins may provide 30mA of current. To
achieve operations with VCH1/VCH2 current over 60mA,
connect the ICs in parallel.
MAIN APPLICATIONS
•
LED Light Bars, LED Bulbs, LED Fluorescent Lights,
LED Backlight
BLOCK DIAGRAM
1
HM7502
©1999~2014
2-channel Constant Current Regulator
ORDERING INFORMATION
Part Number
HM7502PR
HM7502MR
I2C
No
No
Package
SOT89-5
SOT23-5
Eco
Description
Pb-free
RoHS compliant
RoHS compliant
Pb-free
PIN DESCRIPTION
SOT89-5
SOT23-5
SOT89-5
No
Pin
VCH1
GND
VCH2
REXT
VDD
Type
Description
1
PWR
GND
PWR
I
Current driver output.
Ground
2
3
Current driver output.
4
Connect a resistor to Ground for adjusting current
5
PWR
GND
Input supply voltage.
Ground
Thermal Pad
GND
SOT23-5
No
1
Pin
VCH1
GND
VCH2
REXT
VDD
Type
PWR
GND
PWR
I
Description
Current driver output.
Ground
2
3
Current driver output.
Connect a resistor to Ground for adjusting current
Input Supply voltage
4
5
PWR
2
HM7502
©1999~2014
2-channel Constant Current Regulator
MAXIMUM RATING
Symbol
VDD
Parameter
Range
44
Unit
V
Supply Voltage
V (CH1, CH2)
I (CH1, CH2)
I (GND)
TJ
Current Regulator Output Voltage
Current Regulator Output Current
Output Saturation Current
44
V
65
mA
mA
oC
132
Junction Temperature
150
TSTG
Storage Temperature
–40 ~ +125
150
oC
R
TH ( j-a )
TH ( j-c )
Thermal Resistance (junction to ambient) SOT89-5
Thermal Resistance (junction to case) SOT89-5
Power Dissipation (SOT89-5) [Note]
Thermal Resistance (junction to ambient) SOT23-5
Thermal Resistance (junction to case) SOT23-5
Power dissipation (SOT23-5), Ta=25 oC
oC/W
oC/W
mW
oC/W
oC/W
mW
R
50
Pt-sot89-5
1000
215
R
TH ( j-a )
TH ( j-c )
R
50
Pt-sot23-5
Note:
Conditions for Power Dissipation (SOT89-5) :
550
Double-side FR4, PCB Size 50mmx50mmx1.6mm, Copper Ratio approx. 10% for top side and approx. 100% for back side,
No through-holes, and Ta=25oC.
3
HM7502
©1999~2014
2-channel Constant Current Regulator
DC CHARACTERISTICS
VDD=3.0V, VCH1, VCH2=1.0V, CvDD = 0.1uF, C1=C2=10nF, TA=25oC; unless otherwise specified.
Symbol
Characteristics
Condition
Min.
2.5
0.45
0.7
0.85
1
Typical
Max.
40
Unit
VDD
Supply Voltage
–
–
V
V
VDD>5V, ICH1 or ICH2= 30mA
VDD=2.5V, ICH1 or ICH2= 30mA
VDD>5V, ICH1 or ICH2= 60mA
VDD=3V, ICH1 or ICH2= 60mA
40
Output Voltage (30mA)
Output Voltage (60mA)
–
40
V
VCH1, VCH2
–
40
V
–
40
V
IDD
ICH1, ICH2
IAC
Supply Current
–
400
–
600
60
uA
mA
%
Peak Regulated Current
Output Current Accuracy
Temperature Coefficient
External Resistor
30
VDD=3.0V, VCH1 or VCH2=1.0V
Tj=–40 oC ~125 oC
–5
–
+5
tcoe
–500
11250
–0.5
–0.6
–
–
+500
Open
+0.5
+0.6
–
ppm/oC
Ω
REXT
–
%/VDD
%/VCH
tOTP
Line Regulation
VDD=2.5V~40V, VCH1 or VCH2=2.5V
VDD=3.0V, VCH1 or VCH2=2.5V~40V
VDD=2.5V~40V
–
%/V
%/V
oC
Load Regulation
–
OTP Active Temperature
155
95
tOPT_IN
OTP Inactive Temperature VDD=2.5V~40V
–
–
oC
Note: The condition can be achieved with the test circuit only.
TEST CIRCUIT
V
1
LED
V
2
LED
ICH1
ICH2
VDD
CVDD
VDD VCH1 VCH2
C2
C1
HM7502
GND
REXT
REXT
RIN
IVCH (REXT) = (1 +
) • IVCH (open)
REXT
where RIN=11300Ω, and IVCH is reference current with REXT open.
4
HM7502
©1999~2014
2-channel Constant Current Regulator
VDD TIMING
Ta=25oC, ICH=0mA~30mA
Symbol
tRISE
tPLH
Parameter
Condition
Min.
Typical
Max.
Unit
uS
ICH Current Rise, VDD Rise VCH=1V, VDD=0V to 3V, ICH=0mA to 30mA
ICH Current Rise, VDD Rise VCH=1V, VDD=0V to 3V, ICH=0mA to 30mA
–
–
–
–
3
3
5
5
1
1
uS
tFALL
tPHL
ICH Current Fall, VDD Fall
ICH Current Fall, VDD Fall
VCH=1V, VDD=3V to 0V, ICH=30mA to 0mA
VCH=1V, VDD= 3V to 0V, ICH=30mA to 0mA
0.5
0.5
uS
uS
Ta=25oC, ICH=0mA~60mA
Symbol
tRISE
tPLH
Parameter
Condition
Min.
Typical
Max.
Unit
uS
ICH Current Rise, VDD Rise VCH=1.5V, VDD=0V to 5V, ICH=0mA to 60mA
ICH Current Rise, VDD Rise VCH=1.5V, VDD=0V to 5V, ICH=0mA to 60mA
–
–
–
–
4
7
7
1
1
4
uS
tFALL
tPHL
ICH Current Fall, VDD Fall
ICH Current Fall, VDD Fall
VCH=1.5V, VDD=5V to 0V, ICH=60mA to 0mA
VCH=1.5V, VDD=5V to 0V, ICH=60mA to 0mA
0.5
0.5
uS
uS
5
HM7502
©1999~2014
2-channel Constant Current Regulator
TEMPERATURE PROTECTION
Temperature Protection
VDD=2.5~40V
Protection
Typical
155
Unit
oC
Active
Inactive
95
oC
Note: The temperature detection is for the chip; not for ambience.
6
HM7502
©1999~2014
2-channel Constant Current Regulator
APPLICATION SCHEMATIC
7
HM7502
©1999~2014
2-channel Constant Current Regulator
PACKAGE INFORMATION
SOT89-5
Dimension (Unit: mm)
Max.
Dimension (Unit: inch)
Min. Max.
Min.
A
b
1.400
0.320
0.360
0.350
4.400
1.400
2.300
3.940
1.600
0.520
0.560
0.440
4.600
1.800
2.600
4.250
0.055
0.013
0.014
0.014
0.173
0.055
0.091
0.155
0.063
0.020
0.022
0.017
0.181
0.071
0.102
0.167
b1
c
D
D1
E
E1
e
1.500 Typ.
0.060 Typ.
e1
L
2.900
0.900
3.100
1.100
0.114
0.035
0.122
0.043
D
D1
A
E
b1
b
c
e
L
e1
8
HM7502
©1999~2014
2-channel Constant Current Regulator
SOT23-5
Unit: mm
Normal
0.95BSC
1.9BSC
2.80
Unit: mm
Dimension
Dimension
Min.
–
Max.
–
Min.
0.00
0.30
0.10
0.30
5*
Normal
Max.
0.10
0.50
0.20
0.60
10*
A
A1
B
F
G
H
I
–
0.40
0.15
–
–
–
2.60
1.40
2.80
1.00
3.00
1.70
3.10
1.20*
C
1.50
D
2.90
J
–
E
1.10
–
–
–
–
D
H
G
B
C
I
A
A1
J
E
F
9
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