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Active-Semi
Active-Semi

ACT30 Datasheet

HIGH PERFORMANCE OFF-LINE CONTROLLER


ACT30 Datasheet Preview


Datasheet
Rev 2, 5/2005
ACT30
ACT30
HIGH PERFORMANCE OFF-LINE CONTROLLER
ActiveSwitcherTM IC Family
FEATURES
Lowest Total Cost Solution
0.15W Standby Power
Emitter Drive Allows Safe NPN Flyback Use
Hiccup Mode Short Circuit
Current Mode Operation
www.DataSheeOtv4Ue.rc-Comurrent Protection
Under-voltage Protection with Auto-restart
Proprietary Scalable Output Driver
Flexible Packaging Options (including TO-92)
65kHz or 100kHz Switching Frequency
Selectable 0.4A to 1.2A Current Limit
APPLICATIONS
Battery Chargers
Power Adaptors
Standby Power Supplies
Appliances
Universal Off-line Power Supplies
GENERAL DESCRIPTION
The ACT30 is a high performance
green-energy offline power supply controller. It
features a scalable driver for driving external
NPN or MOSFET transistors for line voltage
switching. This proprietary architecture enables
many advanced features to be integrated into a
small package (TO-92 or SOT23-5), resulting in
lowest total cost solution.
The ACT30 design has 6 internal terminals
and is a pulse frequency and width modulation IC
with many flexible packaging options. One
combination of internal terminals is packaged in
the space-saving TO-92 package (A/B/C/D
versions) for 65kHz or 100kHz switching
frequency and with 400mA or 800mA current limit.
The E version (SOT23-5) can be configured for
higher current limit.
Consuming only 0.15W in standby, the IC
features over-current, hiccup mode short circuit,
and under-voltage protection mechanisms.
The ACT30 is ideal for use in high
performance universal adaptors and chargers.
For highest performance versus cost and
smallest PCB area, use the ACT30 in
combination with the ACT32 CV/CC Controller.
Figure 1. Simplified Application Circuit
Active-Semi, Inc.
-1-
Confidential to Micro Bridge
Page 1

ACT30
ORDERING INFORMATION
PART NUMBER
ACT30AHT-A
ACT30BHT-A
ACT30CHT-A
ACT30DHT-A
ACT30EUC-T
SWITCHING FREQUENCY
65kHz
65kHz
100kHz
100kHz
SELECTABLE
CURRENT LIMIT
400mA
800mA
400mA
800mA
ADJUSTABLE
TEMPERATURE RANGE
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
PACKAGE
TO-92
TO-92
TO-92
TO-92
SOT23-5
PINS
3
3
3
3
5
PIN CONFIGURATION
www.DataSheet4U.com
ACT30A
ACT30B
ACT30C
ACT30D
123
TO-92
VDD 1
5 DRV1
GND 2 ACT30E
FREQ 3
4 DRV2
SOT23-5
PIN DESCRIPTION
PIN NUMBER
TO-92 SOT23-5
PIN NAME
11
VDD
22
GND
3 DRV
5 DRV1
4 DRV2
3 FREQ
PIN DESCRIPTION
Power Supply Pin. Connect to optocoupler's emitter. Internally limited to
5.5V max. Bypass to GND with a proper compensation network.
Ground
Driver Output (TO-92 Only). Connect to emitter of the high voltage NPN or
MOSFET. For ACT30A/C, DRV pin is internally connected to DRV1. For
ACT30B/D, DRV pin is internally connected to both DRV1 and DRV2.
Driver Output 1 (SOT23-5 Only). Also used as supply input during startup.
Driver Output 2 (SOT23-5 Only)
Frequency Select (SOT23-5 Only). This terminal has an internal 200kpull
down resistor. Connect to VDD for 100kHz operation. Connect to GND or
leave unconnected for 65khz operation.
Active-Semi, Inc.
- 2 - Confidential to Micro Bridge
Page 2

ACT30
ABSOLUTE MAXIMUM RATINGS
(Note: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long
periods may affect device reliability.)
PARAMETER
VDD, FREQ Pin Voltage
VDD Current
DRV, DRV1, DRV2 Voltage
Continuous DRV, DRV1, DRV2 Current
Maximum Power Dissipation
Operating Junction Temperature
www.DataSShteoerat4gUe .Tceommperature
Lead Temperature (Soldering, 10 sec)
TO-92
SOT23-5
VALUE
-0.3 to 6
20
-0.3 to 18
Internally limited
0.6
0.39
-40 to 150
-55 to 150
300
UNIT
V
mA
V
A
W
°C
°C
°C
ELECTRICAL CHARACTERISTICS
(VDD = 4V, TJ = 25°C unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VDD Start Voltage
DRV1 Start Voltage
VSTART Rising edge
4.75 5 5.25 V
DRV1 must be higher ACT30A/C
VDRVST than this voltage to
start up.
ACT30B/D
8.6 10.5
V
9.6 11.5
DRV1 Short-Circuit Detect Threshold
VDD Under-voltage Threshold
VDD Clamp Voltage
Startup Supply Current
Supply Current
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Effective Current Limit
VSCDRV
VUV
IDDST
IDD
fSW
DMAX
DMIN
ILIM
Falling edge
10mA
VDD = 4V before VUV
ACT30A/B or FREQ = 0
ACT30C/D or FREQ = VDD
ACT30A/C, VDD = 4V
ACT30B/D, VDD = 4V
VDD = 4.6V
VDD = VUV +
0.1V
ACT30A/C
ACT30B/D; ACT30E
with DRV1 = DRV2
6.8 V
3.17 3.35 3.53 V
5.15 5.45 5.75 V
0.23 0.45 mA
0.7 1 mA
55 65 85 kHz
75 100 125
67 75 83 %
60
3.5 %
400
mA
800
VDD to DRV1 Current Coefficient
VDD Dynamic Impedance
DRV1 or DRV2 Driver On-Resistance
DRV1 Rise Time
DRV1 Fall Time
GGAIN
RVDD
RDRV1, 2
IDRV1 = IDRV2 = 0.05A
1nF load, 15pull-up
1nF load, 15pull-up
-0.29 A/V
9 k
3.6
30 ns
20 ns
DRV1 and DRV2 Switch Off Current
Driver off, VDRV1 = VDRV2 = 10V
12 30 µA
Active-Semi, Inc.
- 3 - Confidential to Micro Bridge
Page 3

ACT30
FUNCTIONAL DESCRIPTION
Figure 2 shows the Functional Block Diagram
of the ACT30. The main components include
switching control logic, two on-chip
medium-voltage power-MOSFETs with parallel
current sensor, driver, oscillator and ramp
generator, current limit VC generator, error
comparator, hiccup control, bias and
undervoltage-lockout, and regulator circuitry.
As seen in Figure 2, the design has 6 internal
terminals. VDD is the power supply terminal.
DRV1 and DRV2 are linear driver outputs that
can drive the emitter of an external high voltage
NPN transistor or N-channel MOSFET. This
www.DataSehmeeittt4eUr-.cdorimve method takes advantage of the high
VCBO of the transitor, allowing a low cost
transistor such as ‘13003 (VCBO = 700V) or
‘13002 (VCBO = 600V) to be used for a wide AC
input range. The slew-rate limited driver coupled
with the turn-off characteristics of an external
NPN result in lower EMI.
The driver peak current is designed to have a
negative voltage coefficient with respect to
supply voltage VDD, so that lower supply voltage
automatically results in higher DRV1 peak
current. This way, the optocoupler can control
VDD directly to affect driver current.
STARTUP SEQUENCE
Figure 1 shows a Simplified Application
Circuit for the ACT30. Initially, the small current
through resistor R1 charges up the capacitor C1,
and the BJT acts as a follower to bring up the
DRV1 voltage. An internal regulator generates a
VDD voltage equal to VDRV1 – 3.6V for ACT30A/C
(VDRV1 – 4.6V for ACT30B/D) but limits it to 5.5V
max. As VDD crosses 5V, the regulator sourcing
function stops and VDD begins to drop due to its
current consumption. As VDD voltage decreases
below 4.75V, the IC starts to operate with
increasing driver current. When the output
voltage reaches regulation point, the optocoupler
feedback circuit stops VDD from decreasing
further. The switching action also allows the
auxiliary windings to take over in supplying the
C1 capacitor. Figure 3 shows a typical startup
sequence for the ACT30.
To limit the auxiliary voltage, use a 12V zener
diode for ACT30A/C or a 13V zener for
ACT30B/D (D1 diode in Figure 1).
Even though up to 2Mstartup resistor (R1)
can be used due to the very low startup current,
the actual R1 value should be chosen as a
compromise between standby power and startup
time delay.
VDD
9k
BIAS
& UVLO
REGULATOR
−+
3.6V (ACT30A/C)
4.6V (ACT30B/D)
HICCUP
CONTROL
DRV1
DRV2
FREQ
200k
OSC &
RAMP
CURRENT
4.75V
ILIM VC
GENERATOR
+
10uA/V
PFWM
SWITCHING
CONTROL
LOGIC
ERROR
COMP +
SLEW
20k
1x 56x
40
20k
56x
FREQ terminal wire-bonded to VDD in ACT30C/D (TO-92)
DRV2 terminal wire-bonded to DRV1 in ACT30B/D (TO-92)
Figure 2. Functional Block Diagram
GND
GND
Active-Semi, Inc.
- 4 - Confidential to Micro Bridge
Page 4
Part Number ACT30
Manufactur Active-Semi
Description HIGH PERFORMANCE OFF-LINE CONTROLLER
Total Page 9 Pages
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ACT30 datasheet
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ACT30 datasheet
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