MIC4830
Low Noise 180V
PP
EL Driver
General Description
The MIC4830 is a low noise 180V
PP
electroluminescent
lamp (EL) driver. Using advanced Bipolar, CMOS, DMOS
(BCD) technology, the MIC4830 integrates a high voltage
boost converter and an H-bridge driver for driving a large
EL lamp. The MIC4830 can drive large panel displays for
mobile phones, multimedia players or automotive
electronics where EL panels are used for backlighting.
The MIC4830 offers design flexibility with adjustable lamp
and boost converter frequencies, simply by applying
external resistors. A new H-Bridge design reduces audible
noise by creating smoother AC voltage across the EL
panel.
The MIC4830 is offered in MLF
®
3mm × 3mm and
MSOP-8 Pb-free and RoHS-compliant packaging with a
–40°C to 85°C junction temperature range.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
1.8V to 5.5V input voltage
180Vpp output voltage
Low audible noise EL drive waveform
Supports EL panel sizes up to 4in
2
(25cm
2
)
Low 45µA operating supply current
Small inductor size with low profile (220µH)
Tiny 8-pin 3mm × 3mm MLF
®
package
Adjustable boost converter frequency
Adjustable EL lamp frequency
Low 10nA shutdown current
Applications
•
•
•
•
•
•
•
•
LCD panel backlight
Mobile Phones
PDAs
Pagers
Calculators
Multimedia Players
Remote controls
GPS Receivers
Typical Application
Low Noise EL Driver
MLF and
MicroLeadFrame
are registered trademark of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July 2009
M9999-070709-C
Micrel
MIC4830
Ordering Information
Part Number
MIC4830YML
MIC4830YMM
Note
*MLF
is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
Junction Temp. Range
–40° to +85°C
–40° to +85°C
Package
8-Pin 3mm × 3mm MLF
®
8-Pin MSOP
Lead Finish
RoHS-Compliant / Pb-Free / Halogen Free*
RoHS-Compliant / Pb-Free
Pin Configuration
8-Pin MSOP (MM)
8-Pin 3mm × 3mm MLF
®
(ML)
Pin Description
Pin Number
1
2
Pin Name
VDD
RSW
Pin Function
Supply (Input): 1.8V to 5.5V for internal circuitry.
Switch Resistor (External Component): Set switch frequency of the internal
power MOSFET by connecting an external resistor to VDD. Connecting the
external resistor to GND disables the switch oscillator and shuts down the
device.
EL Resistor (External Component): Set EL frequency of the internal H-bridge
driver by connecting an external resistor to VDD. Connecting the external
resistor to GND disables the EL oscillator.
Ground.
Switch Node (Input): Internal high-voltage power MOSFET drain.
Regulated Boost Output (External Component): Connect to the output capacitor
of the boost regulator and connect to the cathode of the diode.
EL Output: Connect to one end of the EL lamp. Polarity is not important.
EL Output: Connect to one end of the EL lamp. Polarity is not important.
3
REL
4
5
6
7
8
GND
SW
CS
VB
VA
July 2009
2
M9999-070709-C
Micrel
MIC4830
Absolute Maximum Ratings
(1)
Supply Voltage (V
DD
)...................................... –0.5V to 6.0V
Output Voltage (V
CS
) ..................................... –0.5V to 120V
EL Lamp Terminals (V
A
, V
B
)................................... V
CS
+ 3V
Switch Voltage (Vsw)…………………………..-0.5V to 120V
Frequency Control Voltage
(V
RSW
,
V
REL
) .................................... –0.5V to (V
DD
+0.3V)
Storage Temperature (T
S
).........................–65°C to +150°C
ESD Rating
(4)
............................................................... 1.5kV
Operating Ratings
(2)
Supply Voltage (V
DD
).................................... +1.8V to +5.5V
Lamp Drive Frequency (f
EL
) ....................... 60Hz to 1000Hz
Switching Frequency (f
SW
).........................65kHz to 250kHz
Ambient Temperature (T
A
) .......................... –40°C to +85°C
Package Thermal Resistance
(3)
MSOP (
θ
JA
) ......................................................206°C/W
MLF
®
(
θ
JA
)..........................................................63°C/W
Electrical Characteristics
(5)
V
IN
= V
DD
= 3.0V, R
SW
= 332KΩ, R
EL
= 1.78MΩ. T
A
= 25°C unless otherwise specified.
Bold
values indicate
–40°C
≤
T
A
≤
+85°C.
Parameter
On-resistance
CS Voltage Variation
Enable Input Low
Voltage (turn-off)
Enable Input High
Voltage (turn-on)
Shutdown current
Input supply current
Condition
I
SW
= 100mA
V
DD
= 1.8V to 5.5V
V
DD
= 1.8V to 5.5V
V
DD
= 1.8V to 5.5V
R
SW
Resistor = LOW; R
EL
Resistor = LOW; V
DD
= 5.5V
R
SW
Resistor = HIGH;
R
EL
Resistor = HIGH;
V
CS
= 90V; V
A
, V
B
OPEN
Input current including
inductor
V
A
– V
B
output drive
frequency
Switching transistor
frequency
Switching transistor duty
cycle
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T
A
(ambient temperature) is P
D(max)
= (T
J(max)
– T
A
) /
θ
JA
. Exceeding the maximum allowable power
dissipation will result in excessive die temperature.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
Min
76
Typ
3.8
88
Max
7
99
0.5
Units
Ω
V
V
V
V
DD
-
0.5
0.01
45
0.5
75
µA
µA
V
IN
= V
DD
= 3.2V; R
SW
= 290KΩ; R
EL
= 1.78MΩ;
L=220µH; R
OUT
= 10kΩ; Lamp = 2in
2
R
EL
=1.78MΩ
R
SW
= 332KΩ
158
90
15
200
112
90
242
134
mA
Hz
kHz
%
July 2009
3
M9999-070709-C
Micrel
MIC4830
Typical Characteristics
July 2009
4
M9999-070709-C
Micrel
MIC4830
July 2009
5
M9999-070709-C
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
