HM9923T [HMSEMI]
High-Voltage LED DRriver with Build-In MOSFET Switch;型号: | HM9923T |
厂家: | H&M Semiconductor |
描述: | High-Voltage LED DRriver with Build-In MOSFET Switch |
文件: | 总6页 (文件大小:483K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
HM9921/HM9922/HM9923
HIGH-VOLTAGE LED DRIVER
WITH BUILD-IN MOSFET SWITCH
HM9921/2/3
FEATURES
SOT-89
TO-92
▪ Operating temperature range -40 ..+85 ºС
▪ ON-resistance of the MOSFET switch
210 Ohm for ambient temperature 25 ºС
1
2
3
1.Drain
2. GND
3. VDD
▪ OFF-state breakdown voltage of the
MOSFET switch not less 500 V for
Ambient temperature 25 ºC.
1.Drain
2.GND
3.VDD
ORDERING INFORMATION
Operating
Temperature Range
Device
Package
Packing
HM9921T, HM9922T, HM9923T
HM9921PR, HM9922PR, HM9923PR
TO-92
SOT-89
Tape
Tape & Reel
ТА = - 40 ... + 85 С
DESCRIPTION
HM9921, HM9922, HM9923 are high-voltage LED driver control ICs with build-in MOSFET switch
and purposed for LED lighting control.
They allow efficient operation of LED strings from voltage sources ranging up to 400VDC.
The HM9921/2 includes an internal high-voltage switching MOSFET controlled with fixed off-time
TOFF of approximately 10µs. The LED string is driven at constant current, thus providing constant
light output and enhanced reliability. The output current is internally fixed at 20mA for HM9921,
50mA for HM9922 and 30mA for HM9923. The peak current control scheme provides good regulation
of the output current throughout the universal AC line voltage range of 85 to 264V AC or DC input
voltage of 20 to 400V.
PIN DESCRIPTION
Pin No
Description
Symbol
This is a drain terminal of the output switching MOSFET and a
linear Regulator input.
1
Drain
2
3
GND
V DD
This is a common connection for all circuits
This is a power supply pin for all control circuits.
Bypass this pin with a 0.1uF low impedance capacitor.
1
Shenzhen H&M Semiconductor Co.Ltd
http://www.hmsemi.com
HM9921/HM9922/HM9923
BLOCK DIAGRAM
VDD
DRAIN
VT1
REGULATOR
7.5 V
RC-OSCILLATOR
REFERENCE
VOLTAGE
SOURCE
S
Q
Q
VREF
VT2
FORMER
-
R
+
DELAY LINE
R1
2
Shenzhen H&M Semiconductor Co.Ltd
http://www.hmsemi.com
HM9921/HM9922/HM9923
ABSOLUTE MAXIMUM RATINGS
Limit
Unit
Symbol
VIN
Parameter
Min
-0.3
Max
Input voltage
Low-voltage (control) part of IC supply
voltage
420
V
V
VDD
-0.3
10
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
RECOMMENDED OPERATION RANGE
Limit
Symbol
Parameter
Unit
Min
Max
VIN
Input voltage
20
400
V
ELECTRICAL CHARACTERISTICS
Limit
Ambient
Symbol
VDDR
Parameter
Test Condition
temperature,
Unit
Min
Max
oC
Regulator output voltage
VIN = (20- 400)V
5.5
-
9.0
V
Low-voltage (control) part
of IC consumption
current
VDD = 9,5 V
VIN = 40 V
IDD
350
210
uA
ON-resistance of the
switch (DRAIN pin)
VDD = VDDR
IDRAIN = 20 mA
RON
VUVLO
ISAT
-
Ohm
Undervoltage threshold
(Low-voltage part of IC)
VDD = VUVLO
IDRAIN = 20 mA
VDDR
0.3
–
4.0
100
V
25 10
MOSFET saturation
current (DRAIN pin)
VDD= VDDR
VSAT = 50 V
-
mA
OFF-state breakdown
voltage of the MOSFET
switch (DRAIN pin)
VBR
VDD = VDDR
IDRAIN = 1 mA
-
500
V
Threshold current
HM9921
HM9922
20.5
52.0
30.8
25.5
63.0
38.2
25 10
-40
ITH
VDD = VDDR
VIN = 50 V
mA
us
HM9923
85
OFF time
(DRAIN pin)
TOFF
TON
8.0
-
13.0
650
Minimum ON-time of the
switch (DRAIN pin)
ns
ns
VDD = VDDR
VIN = 50 V
25 10
Leading Edge Blanking
Delay
TBLANK
200
400
3
Shenzhen H&M Semiconductor Co.Ltd
http://www.hmsemi.com
HM9921/HM9922/HM9923
RECOMMENDED APPLICATION DIAGRAM
AC – AC supply voltage source
С1 – capacitor C= 0.1uF ± 10 %
D1 – microcircuit
L1 – inductor (coil)
Inductor feature L, mH, is calculated by formula:
15NU
F
L =
,
dIO
N – Quantity of diodes in LED string, pcs.;
VF – LED forward voltage for nominal current, V;
dIO – LED circuit permissible current ripple, mA
LED1 – LEDN – LEDs (light emitting diodes) with nominal current:
- 20 mA for HM9921 application;
- 50 mA for HM9922 application;
- 30 mA for HM9923 application
VD1 – high-voltage diode with breakdown voltage not less 500V
and forward current:
- not less 25.5 mA for HM9921 application;
- not less 63.0 mA for HM9922 application;
- not less 38.2 mA for HM9923 application
4
Shenzhen H&M Semiconductor Co.Ltd
http://www.hmsemi.com
HM9921/HM9922/HM9923
PACKAGE DIMENSION
TO-92
Taping Specification
5
Shenzhen H&M Semiconductor Co.Ltd
http://www.hmsemi.com
HM9921/HM9922/HM9923
6
Shenzhen H&M Semiconductor Co.Ltd
http://www.hmsemi.com
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