MIC3230 Datasheet, PDF (3/20 Pages) Micrel Semiconductor – Constant Current Boost Controller for Driving High Power LEDs

Micrel, Inc.
MIC3230/1/2
Pin Configuration
VIN 1
EN 2
PWMD 3
COMP 4
IADJ 5
10 VDD
9 DRV
8 PGND
7 OVP
6 IS
VIN 1
EN 2
PWMD 3
COMP 4
IADJ 5
FS 6
EPAD
12 VDD
11 DRV
10 PGND
9 OVP
8 IS
7 SYNC/NC
N/C 1
VIN 2
EN 3
PWMD 4
COMP 5
IADJ 6
FS 7
AGND 8
EPAD
16 N/C
15 VDD
14 DRV
13 PGND
12 OVP
11 IS
10 SYNC/NC
9 N/C
MSOP-10 (MM)
MIC3232
3mmx3mmMLF^®-12L (ML)
MIC3230, MIC3231
See Product Option Matrix for selection
TSSOP-16 (TSE)
MIC3230, MIC3231
See Product Option Matrix for selection
Pin Description
Pin Number
3x3MLF
--
1
2
Pin Number
TSSOP-16L
1
2
3
3
4
4
5
5
6
6
7
--
8
--
9
7
10
8
11
9
12
10
13
11
14
12
15
--
16
--
--
Pin Number
MSOP-10L
--
1
2
3
4
5
--
--
--
--
6
7
8
9
10
--
--
Pin Name
NC
VIN
EN
PWMD
COMP
IADJ
FS
AGND
NC
SYNC
IS
OVP
PGND
DRV
VDD
NC
EPAD
Pin Function
No Connect
Input Voltage (power) 6V to 45V
Enable Control (Input). Logic High (≥1.5V) enables
the regulator. Logic Low (≤0.4V) shuts down the
regulator. Connect a 100kΩ resistor from EN to VIN.
PWM input. High signal terminates the output
power. Low Signal starts up the output power.
Compensation (output): for external compensation
Feedback (input)
Frequency Select (input). Connected to a Resistor
to determine the operating frequency
Analog Ground
No Connect
Sync (output). Connect to another MIC3230 to
synchronize multiple converters.
Current Sense (input). Connected to external
current sense resistor which in turn is connected to
the source of the external FET as well as an external
slope compensation resistor
OVP divider connection (output). Connect the top of
the divider string to the output. If the load is
disconnected, the output voltage will rise until OVP
reaches 1.25V and then will regulate around this
point
Power Ground
Drive Output: connect to the gate of external FET
(output)
VDD Filter for internal power rail. Do not connect an
external load to this pin. Connect 10µF to GND.
No Connect
Connect to AGND
January 2009
3
M9999-011409-A