APU3039 查看數據表（PDF） - Advanced Power Electronics Corp
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APU3039 Datasheet PDF : 22 Pages
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Advanced Power
Electronics Corp.
APU3039
PARAMETER
Error Amp
Fb Voltage Input Bias Current
Fb Voltage Input Bias Current
Transconductance
VP Voltage Range
Soft-Start Section
Charge Current
Oscillator Section
Frequency
Ramp Amplitude
Output Drivers
Lo Drive Rise Time
Hi Drive Rise Time
Lo Drive Fall Time
Hi Drive Fall Time
Dead Band Time
Max Duty Cycle
Min Duty Cycle
Internal Regulator
Output Voltage
Drive Current
Current Limit
OC Threshold Set Current
OC Comp Off-Set Voltage
SYM
TEST CONDITION
IFB1
SS=3V
IFB2
SS=0V
VP
Note 1
SS IB
Freq
VRAMP
SS=0V
Rt=Open
Rt=Gnd
Note 1
Tr(LO)
Tr(HI)
Tf(LO)
Tf(HI)
TDB
DMAX
DMIN
CLOAD=1500pF, VCC=12V
CLOAD=1500pF, VCC=12V
CLOAD=1500pF
CLOAD=1500pF
HDrv going Hi or Low
Fb=0.6V, Freq=200KHz
Fb=1.0V
VOUT2
IOUT2
Vcc=12V
IOCSET
VOC(OFFSET)
Note 1: Guaranteed by design but not tested for production.
MIN TYP MAX UNITS
-1 +0.08 +1 µ A
30
55
70
µA
700
µmho
0.8
1.5
V
14
22
35
µA
200
KHz
400
1.25
VPP
40 100 ns
40 100 ns
40 100 ns
40 100 ns
100
ns
88
%
0
%
5.7
6
6.3
V
40
65
mA
21
28
35
µA
-2
1.5
5
mV
PIN DESCRIPTIONS(APU3039VN)
PIN#
1
4
6
7
8
9
10
12
PIN SYMBOL
VREF
Vcc
LDrv
PGnd
Gnd
HDrv
Vc
Rt
PIN DESCRIPTION
Reference Voltage. This pin can source current about 2µA.
This pin provides biasing for the internal blocks of the IC as well as power for the low side
FET driver. A minimum of 1µF, high frequency capacitor must be connected from this pin
to ground to provide peak drive current capability.
Output driver for the synchronous power MOSFET.
This pin serves as the separate ground for MOSFET's driver and should be connected to
system's ground plane.
This pin serves as analog ground for internal reference and control circuitry. A high fre-
quency capacitor must be connected from Vcc pin to this pin for noise free operation.
Output driver for the high side power MOSFET. This pin should not go negative (below
ground), this may cause problem for the gate drive circuit. It can happen when the inductor
current goes negative (Source/Sink), soft-start at no load and for the fast load transient
from full load to no load. To prevent negative voltage at gate drive, a low forward voltage
drop diode might be connected between this pin and ground.
This pin is connected to a voltage that must be at least 4V higher than the bus voltage of
the switcher (assuming 5V threshold MOSFET) and powers the high side output driver. A
minimum of 1µF, high frequency capacitor must be connected from this pin to ground to
provide peak drive current capability.
The switching frequency can be Programmed between 200KHz and 400KHz by connect-
ing a resistor between Rt and Gnd. By floating the pin, the switching frequency will be
200KHz and by grounding the pin, the switching frequency will be 400KHz.
3
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