MIC4827 Datasheet, PDF (3/13 Pages) Micrel Semiconductor – Low Input Voltage, 180VPP Output Voltage, EL Driver

MIC4827
Absolute Maximum Ratings (Note 1)
Supply Voltage (V_DD) ....................................... –0.5V to 6V
Output Voltage (V_CS) ................................... –0.5V to 100V
Frequency Control Voltage (V_RSW, V_REL) ... –0.5V to (V_DD +0.3V)
Power Dissipation @ T_A = 85°C ............................. 200mW
Storage Temperature (T_S) ....................... –65°C to +150°C
ESD Rating .............................................................. Note 3
Micrel
Operating Ratings (Note 2)
Supply Voltage (V_DD) .................................. +1.8V to +5.5V
Lamp Drive Frequency (f_EL) ...................... 60Hz to 1000Hz
Switching Transistor Frequency (f_SW) ........ 8kHz to 200kHz
Ambient Temperature (T_A) ......................... –40°C to +85°C
Package Thermal Resistance
MSOP (θ_JA) ....................................................... 206°C/W
Electrical Characteristics
V_IN = V_DD = 3.0V, R_SW = 560KΩ, R_EL = 1.0MΩ. T_A = 25°C unless otherwise specified. Bold values indicate –40°C ≤ T_A ≤ +85°C
Symbol
Parameter
Condition
Min Typ Max Units
R_DS(ON)
V_CS
On-resistance of switching transistor I_SW = 100 mA, V_CS = 85V
Output voltage regulation
V_DD = 1.8V to 5.5V
3.8
7.0
Ω
85
90
95
V
83
97
V
V_A – V_B
Output peak-to-peak voltage
V_DD = 1.8V to 5.5V
170 180 190
V
166
194
V
V_EN-L
V_EN-H
I_SD
I_VDD
I_CS
I_IN
Input low voltage (turn-off)
Input high voltage (turn-on)
Shutdown current, Note 4
Input supply current
Boosted supply current
Input current including inductor
current
V_DD = 1.8V to 5.5V
V_DD = 1.8V to 5.5V
R_SW = LOW; R_EL = LOW;
V_DD = 5.5V
R_SW = HIGH; R_EL = HIGH;
V_CS = 85V; V_A, V_B OPEN
R_SW = HIGH; R_EL = HIGH;
V_CS = 85V; V_A, V_B OPEN
V_IN = V_DD = 1.8V
(See Test Circuit)
0.5
V
V_DD–0.5
V
0.01 0.1
µA
0.5
µA
21
75
µA
200 400
µA
28
mA
f_EL
V_A–V_B output drive frequency
f_SW
Switching transistor frequency
D
Switching transistor duty cycle
285 360 435 Hz
53
66
79 kHz
90
%
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
Shutdown current is defined as the sum of current going into pin 1, 5, and 6 when the device is disabled.
Test Circuit
V_IN
C_IN
10µF
L1
220µH
D1
1N4148
MIC4827
1 _VDD
562k
2
RSW
3.32M
3
REL
4
GND
SW ⁵
6
CS
8
VA
7
VB
100Ω
C_OUT
0.033µF/100V
10nF
September 2001
3
MIC4827