MIC3230_1 Datasheet, PDF (4/19 Pages) Micrel Semiconductor – Constant Current Boost Controller for Driving High Power LEDs

Micrel, Inc.
MIC3230/1/2
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .....................................................+48V
Enable Pin Voltage........................................... -0.3V to +6V
IADJ Voltage ..................................................................+6V
Lead Temperature (soldering, sec.) ........................... 260°C
Storage Temperature (Ts)..........................-65°C to +150°C
ESD Rating⁽³⁾
MIC3230 ....................................... 1500V HB, 100VMM
MIC3232 ........................................... 2kV HB, 100VMM
MIC3231 ....................................... 1500V HB, 150VMM
Operating Ratings⁽²⁾
Supply Voltage (V_IN)......................................... +6V to +45V
Junction Temperature (TJ)........................ –40°C to +125°C
Junction Thermal Resistance
MSOP (θ_JA) ...................................................130.5°C/W
EPAD TSSOP (θ_JA).........................................36.5°C/W
MLF^® (θ_JA).......................................................60.7°C/W
Electrical Characteristics⁽⁴⁾
V_IN = 12V; V_EN = 3.6V; L = 47µH; C = 4.7µF; T_J = 25°C, Bold values indicate –40°C≤ T_J ≤ +125°C, unless noted.
Symbol Parameter
Condition
Min Typ
V_IN
Supply Voltage Range
6
UVLO Under Voltage Lockout
3.5
4.9
I_VIN
Quiescent Current
V_FB > 275mV (to ensure device is not
3.2
switching)
I_SD
Shutdown Current
V_EN = 0V
30
V_IADJ
Feedback Voltage (at IADJ)
Room temperature (3%)
242.5 250
–40°C≤ T_J ≤ +125°C (5%)
237.5 250
I_ADJ
Feedback Input Current
V_FB = 250mV
1.2
Line Regulation
V_IN = 12V to 24V
2
Load Regulation
V_OUT to 2 × V_OUT
2
D_MAX
Maximum Duty Cycle
MIC3230 & MIC3232
90
MIC3231
88
V_EN
Enable Threshold
Turn ON
Turn OFF
1.5 1.15
1.1
I_EN
Enable Pin Current
V_EN = 3.3V
17
REN = 100kΩ
V_PWM
PWMD Threshold
Turn ON
Turn OFF
1.5 0.75
0.7
f_PWMD
PWMD Frequency Range
Note 5 (L = 47µH; C = 4.7µF)
0
f_SW
Programmable Oscillator
Frequency
R_FREQ = 82.5kΩ
R_FREQ = 21kΩ
R_FREQ = 8.25kΩ
109
360 400
950
f_SW
Fixed Frequency Option
(MIC3232YMM)
360 400
F_DITHER Low EMI (MIC3231)
Frequency dither shift from nominal
±12
V_SENS
Current Limit Threshold Voltage
R_SENSE = 390Ω
0.315 0.45
I_SENSE
I_SENSE Peak Current Out
R_SENSE = 390Ω
250
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
5. Guaranteed by design
Max
45
5.5
10
257.5
262.5
3
0.4
30
0.4
500
440
440
0.585
Units
V
V
mA
µA
mV
mV
µA
%
%
%
%
V
V
µA
V
V
Hz
kHz
kHz
kHz
kHz
%
V
µA
November 2009
4
M9999-113009-B