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Micrel
MIC4830
Absolute Maximum Ratings
(1)
September 2007
3
M9999-091307
(408) 955-1690
Supply Voltage (V
DD
)...................................... –0.5V to 6.0V
Output Voltage (V
CS
)..................................... –0.5V to 120V
EL Lamp Terminals (VA, VB)................................. 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
MSOP (
θ
JA
)......................................................206°C/W
MLF
-8L (
θ
JA
).....................................................63°C/W
Electrical Characteristics
(5)
V
IN
= V
DD
= 3.0V, R
SW
= 332K
, R
EL
= 1.78M
. 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
V
DD
= 1.8V to 5.5V
76
88
99
V
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
V
DD
-
0.5
V
Shutdown current
R
SW
Resistor = LOW; R
EL
Resistor = LOW; V
DD
= 5.5V
0.01
0.5
μ
A
Input supply current
R
SW
Resistor
= HIGH;
R
EL
Resistor
= HIGH;
V
CS
= 90V; V
A
, V
B
OPEN
45
75
μ
A
Input current including
inductor
V
IN
= V
DD
= 3.2V; Rsw = 290K
; Rel = 1.78M
;
L=220μH; Rout=10k
; Lamp = 2in
2
15
mA
V
A
–V
B
output drive
frequency
R
EL
=1.78M
158
200
242
Hz
Switching transistor
frequency
R
SW
=332K
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
(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.