MIC4827YMM Micrel Inc, MIC4827YMM Datasheet

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MIC4827YMM

Manufacturer Part Number
MIC4827YMM
Description
IC EL DRIVER 180VPP OUT 8-MSOP
Manufacturer
Micrel Inc
Type
EL Lamp Driverr
Datasheet

Specifications of MIC4827YMM

Lead Free Status
Lead free
Frequency
60 ~ 1000 Hz
Current - Supply
21µA
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Supply Current
21µA
Meter Display Type
Electroluminescent Lamp
Supply Voltage Range
1.8V To 5.5V
Driver Case Style
MSOP
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Current - Output
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-1803-5
MIC4827YMM

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC4827YMM
Manufacturer:
MICREL
Quantity:
42
Part Number:
MIC4827YMM
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Company:
Part Number:
MIC4827YMM
Quantity:
5
General Description
Micrel’s MIC4827 is a high output voltage, DC to AC con-
verter, designed for driving EL (Electroluminescent) lamps.
The device operates from an input voltage range of 1.8V to
5.5V, making it suitable for 1-cell Li-Ion and 2- or 3-
cellalkaline/NiCad/NiMH
MIC4827 converts a low voltage DC input to a 180V
output signal that drives the EL lamp.
The MIC4827 is comprised of two stages: a boost stage,
and an H-bridge, lamp driver, stage. The boost stage steps
the input voltage up to +90V. The H-bridge stage then
alternately switches the +90V output to each terminal of
the EL lamp, thus creating a 180V
EL lamp and generate light.
The MIC4827 features separate oscillators for the boost-
and H-bridge stages. External resistors independently set
the operating frequency of each stage. This flexibility
allows the EL lamp circuit to be optimized for maximum
efficiency and brightness.
The MIC4827 uses a single inductor and a minimum
number of external components, making it ideal for
portable, space-sensitive applications.
The MIC4827 is available in an 8-pin MSOP package with
an ambient temperature range of –40°C to +85°C.
Typical Application
July 2009
10µF
V
C
IN
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
IN
3.32M
332k
1
2
3
4
VDD
RSW
REL
GND
MIC4827
220µH
L1
battery
SW
CS
VA
VB
2in
5
6
8
7
BAV20WS
PP
2
EL LAMP
D1
AC signal to drive the
applications.
C
0.033µF/100V
OUT
High Voltage EL Driver
PP
The
AC
Features
• 1.8V to 5.5V DC input voltage
• 180V
• Independently adjustable EL lamp frequency
• Independently adjustable boost converter frequency
• 0.1µA shutdown current
Applications
• LCD panel backlight
• Cellular phones
• PDAs
• Pager
• Calculators
• Remote controls
• Portable phones
408
Low Input Voltage, 180V
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
PP
regulated AC output waveform
MIC4827
EL Driver
TIME (2ms/div)
PP
Output Voltage,
M9999-070709-A
(408) 955-1690

Related parts for MIC4827YMM

MIC4827YMM Summary of contents

Page 1

... CS 3.32M 3 REL VA 4 GND VB Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( July 2009 Features • 1.8V to 5.5V DC input voltage • 180V • Independently adjustable EL lamp frequency • Independently adjustable boost converter frequency applications. The • ...

Page 2

... Micrel, Inc. Ordering Information Part Number Standard Pb-Free MIC4827BMM MIC4827YMM Pin Configuration Pin Description Pin Number Pin Name 1 VDD 2 RSW 3 REL 4 GND July 2009 Ambient Temp. Range –40° to +85°C 8-Pin MSOP (MM) Pin Function Supply (Input): 1.8V to 5.5V. Switcher Resistor (External Component): Set switch frequency of the internal power MOSFET by connecting an external resistor to VDD ...

Page 3

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V )............................................–0 Output Voltage (V ) ........................................–0.5 to 100V CS Freq. Control Voltage ( RSW REL Power Dissipation @ T = 85°C ..............................200mW A Storage Temperature (T ) ...

Page 4

Micrel, Inc. Test Circuit 10µF July 2009 L1 D1 220µH BAV20WS MIC4827 1 5 VDD SW 562k 2 6 RSW CS 3.32M 3 8 REL GND VB 4 MIC4827 C OUT 0.033µF/100V 10nF ...

Page 5

Micrel, Inc. Typical Characteristics Switch Resistance vs. Input Voltage 345 INPUT VOLTAGE (V) Switching Frequency vs. Input Voltage 120 R = 332k 100 442k SW 60 ...

Page 6

Micrel, Inc. July 2009 6 MIC4827 M9999-070709-A (408) 955-1690 ...

Page 7

Micrel, Inc. Block Diagram RSW REL Functional Description Overview The MIC4827 is a high-voltage EL driver with an AC output voltage of 180V peak-to-peak capable of driving EL lamps up ...

Page 8

Micrel, Inc. TIME (2ms/div) Figure 2. 108Hz Typical Output Waveform Switching Frequency The switching frequency of the converter is controlled via an external resistor between R SW device. The switching frequency increases as the resistor value decreases. For resistor value ...

Page 9

Micrel, Inc. Application Information Inductor In general, smaller value inductors, which can handle more current, are more suitable to drive larger size lamps. As the inductor value decreases, the switching frequency (controlled should be increased to SW ...

Page 10

Micrel, Inc 2.4V to 5.5V 10µF/6.3V Murata GRM42-6X5R106K6.3 Figure 6. Typical EL Driver for 2in July 2009 L1 220µH Murata LQH4C221K04 C2 MIC4827 1 5 VDD RSW CS 3.32M 332k 3 8 REL ...

Page 11

Micrel, Inc 3.3V to 5.5V 10µF/6.3V Murata GRM42-6X5R106K6.3 Figure 7. Typical EL Driver for 2in July 2009 L1 560k Murata LQ32CN561K21 C2 MIC4827 1 5 VDD RSW CS 3.32M 562k 3 8 REL ...

Page 12

Micrel, Inc 1. 1.8V to 5.5V GRM42-6X5R106K6 1.5V 26mA July 2009 L1 220µH Murata LQH4C221K04 C2 10µF/6.3V MIC4827 Murata GRM42-6X5R106K6.3 1 VDD RSW CS 562k 0.01µF/50V 3 Murata REL VA ...

Page 13

Micrel, Inc 1.8V to 3.3V (2X Alkaline Batteries) 10µF/6.3V Murata GRM42-6X5R106K6.3 July 2009 L1 220µH Murata LQ32CN561K21 C2 MIC4827 1 5 VDD RSW CS 3.32M REL GND ...

Page 14

Micrel, Inc. Package Information July 2009 8-Pin MSOP (MM) 14 MIC4827 M9999-070709-A (408) 955-1690 ...

Page 15

Micrel, Inc. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no ...

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