Micrel MIC4830 DATA SHEET
General Description
MIC4830
Low Noise 180Vp-p EL Driver
Features
The MIC4830 is a low noise 180Vp-p 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
8 Pb-free and RoHS compliant packaging with a –40°C to
85°C junction temperature range.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
®
3mm × 3mm and MSOP-
• 1.8V to 5.5V input voltage
• 180Vpp output voltage
• Low audible noise EL drive waveform
• Supports EL panel sizes up to 4in
• Low 45µA operating supply current
• Small inductor size with low profile (220µH)
• Tiny 8-pin 3mm × 3mm MLF
• Adjustable boost converter frequency
• Adjustable EL lamp frequency
• Low 10nA shutdown current
2
(25cm2)
®
package
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 (
November 2007
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-111507-B
Micrel MIC4830
Ordering Information
Part Number Junction Temp. Range Package Lead Finish
MIC4830YML –40° to +85°C 8-Pin 3mm × 3mm MLF® RoHS Compliant / Pb-Free / Halogen Free*
MIC4830YMM –40° to +85°C 8-Pin MSOP RoHS Compliant / Pb-Free
Note
*MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
Pin Description
Pin Number Pin Name Pin Function
1 VDD Supply (Input): 1.8V to 5.5V for internal circuitry.
2 RSW
3 REL
4 GND Ground
5 SW Switch Node (Input): Internal high-voltage power MOSFET drain.
6 CS
7 VB EL Output: Connect to one end of the EL lamp. Polarity is not important.
8 VA EL Output: Connect to one end of the EL lamp. Polarity is not important.
8-Pin MSOP (MM)
8-Pin 3mm × 3mm MLF
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.
Regulated Boost Output (External Component): Connect to the output capacitor
of the boost regulator and connect to the cathode of the diode.
®
(ML)
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Micrel MIC4830
Absolute Maximum Ratings
(1)
Operating Ratings
(2)
Supply Voltage (VDD)...................................... –0.5V to 6.0V
Output Voltage (V
EL Lamp Terminals (V
) ..................................... –0.5V to 120V
CS
, VB)................................... V
A
CS
+ 3V
Switch Voltage (Vsw)…………………………..-0.5V to 120V
Frequency Control Voltage
(V
Storage Temperature (T
ESD Rating
RSW
,
V
) .................................... –0.5V to (VDD+0.3V)
REL
).........................–65°C to +150°C
(4)
............................................................... 1.5kV
S
Supply Voltage (VDD).................................... +1.8V to +5.5V
Lamp Drive Frequency (f
Switching Frequency (f
Ambient Temperature (T
Package Thermal Resistance
) ....................... 60Hz to 1000Hz
EL
).........................65kHz to 250kHz
SW
) ..........................–40°C to +85°C
A
(3)
MSOP (θJA) ......................................................206°C/W
MLF-8L (θ
) ......................................................63°C/W
JA
Electrical Characteristics
VIN = VDD = 3.0V, RSW = 332K, REL = 1.78M. TA = 25°C unless otherwise specified. Bold values indicate –40°C TA +85°C.
Parameter Condition Min Typ Max Units
On-resistance ISW = 100mA 3.8 7
CS Voltage Variation VDD = 1.8V to 5.5V
Enable Input Low
Voltage (turn-off)
Enable Input High
Voltage (turn-on)
Shutdown current
Input supply current
Input current including
inductor
VA – VB 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
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.
VDD = 1.8V to 5.5V
VDD = 1.8V to 5.5V VDD-
R
SW
R
SW
R
EL
V
CS
V
IN
L=220µH; R
REL=1.78M
RSW = 332K
(5)
Resistor = LOW; REL Resistor = LOW; VDD = 5.5V
Resistor = HIGH;
Resistor = HIGH;
= 90V; VA, VB OPEN
= VDD = 3.2V; RSW = 290K; REL = 1.78M;
= 10k; Lamp = 2in2
OUT
(ambient temperature) is P
A
D(max)
= (T
76
88
99
0.5 V
0.5
0.01
45
0.5
75
15 mA
158 200 242 Hz
90 112 134 kHz
90
– TA) / θθθθJA. Exceeding the maximum allowable
J(max)
V
V
µA
µA
%
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Micrel MIC4830
Typical Characteristics
November 2007 4
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