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MIC4832YMM

P1-P3P4-P6P7-P9P10-P11
MIC4832
Low Noise 220V
PP
EL Driver
MLF and MicroLeadFrame is a registered trademark of Amkor Technologies, 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
General Description
The MIC4832 is a low noise 220V
PP
electroluminescent
lamp (EL) driver. Using advanced Bipolar, CMOS, DMOS
(BCD) technology, the MIC4832 integrates a high voltage
boost converter and an H-bridge driver for driving a large
EL lamp. The MIC4832 can drive large panel displays for
mobile phones, multimedia players or automotive
electronics where EL panels are used for backlighting.
The MIC4832 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 MIC4832 is offered in MLF
®
3mm x 3mm and MSOP-
8 lead-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 DC input voltage
• 220Vpp output voltage capable
• Low audible noise EL drive waveform
• Supports EL panel sizes up to 3in
2
(19cm
2
)
• Low 45µA operating supply current
• Small inductor size with low profile (220uH)
• Tiny 8-pin 3mm x 3mm MLF
®
package
• Adjustable boost converter frequency
• Adjustable EL lamp frequency
• 10nA shutdown current
Applications
• LCD panel backlight
• Mobile Phones
• PDAs
• Pagers
• Calculators
• Multimedia Players
• Remote controls
• GPS Receivers
___________________________________________________________________________________________________________
Typical Application
Low Noise EL Driver
March 2009
M9999-033109-C
Micrel MIC4832
March 2009
2
M9999-033109-C
Ordering Information
Part Number Junction Temp. Range Package Lead Finish
MIC4832YML –40° to +85°C 8-Pin 3mm × 3mm MLF
®
RoHS Compliant / Pb-Free / Halogen Free*
MIC4832YMM –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
8-Pin MSOP (MM)
8-Pin 3mm × 3mm MLF
®
(ML)
Pin Description
Pin Number Pin Name Pin Function
1 VDD Supply (Input): 1.8V to 5.5V for internal circuitry.
2 RSW
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.
3 REL
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.
4 GND Ground
5 SW Switch Node (Input): Internal high-voltage power MOSFET drain.
6 CS
Regulated Boost Output (External Component): Connect to the output capacitor
of the boost regulator and connect to the cathode of the diode.
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.
Micrel MIC4832
March 2009
3
M9999-033109-C
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)
.................................................................. 2kV
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 (θJA) .....................................................206°C/W
MLF
®
(θJA) .........................................................63°C/W
Electrical Characteristics
(5)
V
IN
= V
DD
= 3.0V, R
SW
= 338KΩ, R
EL
= 1.78MΩ. T
A
= 25°C unless otherwise specified. Bold values indicate –40°C ≤ T
A
≤ +85°C
Parameter Condition Min Typ Max Units
On-resistance I
SW
= 100mA 3.8 7 Ohm
CS Voltage Variation
91
105
119
Enable Input Low Voltage
(turn-off)
V
DD
= 1.8V to 5.5V 0.5 V
Enable Input High Voltage
(turn-on)
V
DD
= 1.8V to 5.5V
VDD-
0.5
V
Shutdown current R
SW
Resistor = LOW; R
EL
Resistor = LOW; V
DD
= 5.5V 0.01
0.5
μA
Input supply current
R
SW
Resistor = HIGH;
R
EL
Resistor = HIGH;
V
CS
= 110V; V
A
, V
B
OPEN
45
75
μA
Input current including
inductor
V
IN
= V
DD
= 3.2V; R
SW
= 338KΩ, R
EL
= 1.78MΩ;
L=220µH; R
OUT
=10kΩ; Lamp = 2in
2
24 mA
V
A
– V
B
output drive
frequency
R
EL
= 1.78MΩ
158 200 242 Hz
Switching transistor
frequency
R
SW
= 338KΩ
90 112 134 kHz
Switching transistor duty
cycle
90 %
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.
P1-P3P4-P6P7-P9P10-P11

MIC4832YMM

Mfr. #:
Buy MIC4832YMM
Manufacturer:
Microchip Technology / Micrel
Description:
LED Lighting Drivers 220Vpp Low Noise EL Driver
Lifecycle:
New from this manufacturer.
Delivery:
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