AP2001
Monolithic Dual Channel PWM Controller
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.3 Feb 20, 2004
1/8
Features
- Dual PWM Control Circuitry
- Operating voltage can be up to 50V
- Adjustable Dead Time Control (DTC)
- Under voltage Lockout (UVLO) Protection
- Short Circuit Protection (SCP)
- Variable Oscillator Frequency...... 500Khz Max
- 2.5V voltage reference Output
- 16-pin PDIP and SOP packages
Applications
- Backlight inverter
- DC/DC converts in computers, etc.
General Description
The AP2001 integrates Pulse-width-Modulation
(PWM) control circuit into a single chip, mainly
designs for power-supply regulator. All the functions
included an on-chip 2.5V reference output, two
error amplifiers, an adjustable oscillator, two
dead-time comparators, UVLO, SCP, DTC circuitry,
and dual common-emitter(CE) output transistor
circuit.
Recommend the output CE transistors as pre-driver
for Driving externally. The DTC can provide from
0% to 100%. Switching frequency can be
adjustable by trimming RT and CT. During low VCC
situation, the UVLO makes sure that the outputs
are off until the internal circuit is operational
normally.
Pin Assignments
1
2
3
15
14
13
12
11
10
9
8
7
6
5
4
16
CT
EA2+
EA2-
FB2
DTC2
OUT2
VCC
GND
OUT1
DTC1
FB1
EA1+
RT
REF
SCP
EA1-
( Top View )
PDIP/SOP
Pin Descriptions
Name
Description
CT Timing
Capacitor
RT Timing
Resistor
EA+
Error Amplifier Input(+)
EA -
Error Amplifier Input(-)
FB
Feedback Loop Compensation
DTC
Dead Time Control
OUT Pre-driver
Output
GND Ground
VCC Supply
Voltage
SCP Short
Circuit
Protection
REF Voltage
Reference
AP2001
Monolithic Dual Channel PWM Controller
Anachip Corp.
www.anachip.com.tw Rev. 0.3 Feb 20, 2004
2/8
Ordering Information
AP2001 X X X
Package
Packing
N: PDIP-16L
S: SOP-16L
Blank: Tube
A : Taping
Lead Free
Blank : Normal
L : Lead Free Package
Block Diagram
Bandgap
Reference
DTC2
REF
OUT1
OUT2
PWM Amplifier 2
PWM Amplifier 1
EA1 +
EA1 -
VCC
Oscillator
RT
SCP
CT
DTC1
Error Amplifier 1
FB1
EA2+
EA2 -
Error Amplifier 2
FB2
R
S
VREF
UVLO
R
MAX.500KHz
GND
170K
1.18V
+
-
+
-
+
+
+
+
-
AP2001
Monolithic Dual Channel PWM Controller
Anachip Corp.
www.anachip.com.tw Rev. 0.3 Feb 20, 2004
3/8
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
V
CC
Supply voltage
40
V
V
I
Amplifier input voltage
20
V
V
O
Collector output voltage
40
V
Io
Collector output current
21
mA
T
OP
Operating temperature range
-20 to +85
o
C
T
ST
Storage temperature range
-65 to +150
o
C
T
LEAD
Lead temperature 1.6 mm(1/16 inch) from case for 10 seconds
260
o
C
Recommended Operating Conditions
Symbol
Parameter
Min.
Max.
Unit
V
CC
Supply
voltage
3.6
40
V
V
I
Amplifier
input
voltage
1.05
1.45
V
V
O
Collector output voltage
40
V
I
O
Collector
output
current
20
mA
I
FB
Current into feedback terminal
45
A
R
F
Feedback
resistor
100
k
C
T
Timing
capacitor
150 15000 pF
R
T
Timing
resistor
5.1
100
k
F
OSC
Oscillator
frequency
1
500
Khz
T
OP
Operating free-air temperature
-20
85
C
AP2001
Monolithic Dual Channel PWM Controller
Anachip Corp.
www.anachip.com.tw Rev. 0.3 Feb 20, 2004
4/8
Electrical Characteristics
(T
A
=25C, V
CC
=6V, f=200 Khz)
Reference (REF)
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
Output voltage (pin 16)
I
O
=
1mA
2.4 2.5 2.6 V
T
A
= -20C ~ 25C
-0.1
1
%
V
O
Output voltage change with
temperature
T
A
= 25C ~ 85C
-0.2
1
%
V
DLI
Input
stability
V
CC
=3.6V ~ 40V
2
12.5
mV
V
DLO
Output
stability
I
O
=0.1 mA ~ 1mA
1
7.5
mV
I
O
Short-circuit
output
current
V
O
=0 3
10
30
mA
Under voltage lockout (UVLO)
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
V
UT
Upper threshold voltage (V
CC
)
2.65
V
V
LWT
Lower threshold voltage (V
CC
)
2.45
V
V
HT
Hysteresis
(V
CC
)
I
O(REF)
= 0.1mA
T
A
= 25C
80 200 mV
Short-circuit protection (SCP) control
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
V
IT
Input threshold voltage
T
A
= 25C
0.65
0.7
0.75
V
V
STB
Standby voltage
No pull up
140
185
230
mV
V
LT
Latched input voltage
No pull up
60
120
mV
I
SCP
Input (source) current
V
I
= 0.7V, T
A
= 25C
-10
-15
-20
A
V
CT
Comparator threshold voltage (FB)
1.18
V
Oscillator (OSC)
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
F
OSC
Frequency
C
T
=330 pF, R
T
= 10
k
200 Khz
Standard deviation of frequency
C
T
=330 pF, R
T
= 10
k
10
Frequency change with voltage
V
CC
=3.6V
~
40V
1
T
A
= -20C ~ 25C
-0.4
2
F
OSC
Frequency change with temperature
T
A
= 25C ~ 85C
-0.2
2
%
Dead-time control (DTC)
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
I
BDT
Input
bias
current
1
I
DT
Latch mode (source) current
T
A
= 25C
-80
-145
A
V
DT
Latched input voltage
I
O
= 40A
2.3
V
T0
Zero
duty
cycle
2.05
2.25
V
T100
Input threshold voltage at f= 10 Khz
Maximum duty cycle
1.2
1.45
V
AP2001
Monolithic Dual Channel PWM Controller
Anachip Corp.
www.anachip.com.tw Rev. 0.3 Feb 20, 2004
5/8
Electrical Characteristics (Continued)
Error-amplifier
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
IO
Input
offset
voltage
V
O
(FB)=1.25V
6
mV
I
IO
Input offset current
V
O
(FB)=1.25V
100
nA
I
IB
Input
bias
current
V
O
(FB)=1.25V
160
500
nA
1.05
to
V
CM
Common-mode input voltage
range
V
CC
=3.6V ~ 40V
1.45
V
AV
Open-loop voltage
amplification
R
F
=200 k 70
80
dB
GBW Unity-gain
bandwidth
1.5 MHz
CMRR
Common-mode rejection ratio
60
80
dB
V
OH
Max. output voltage
V
ref
-0.1
V
V
OL
Min.
output
voltage
1 V
I
OI
Output
(sink)
current
(FB)
V
ID
= -0.1V, V
O
= 1.25V
0.5
1.6
mA
I
OO
Output (source) current (FB) V
ID
= 0.1V, V
O
=
1.25V -45
-70 A
Output section
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
I
LEAK
Leakage
current
V
O
= 40V
10
A
V
SAT
Output saturation voltage
I
O
= 10 mA
1.2
2
V
I
SC
Short-circuit
output
current
V
O
= 6V
90
mA
PWM comparator
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
T0
Zero
duty
cycle
2.05
2.25
V
V
T100
Input threshold voltage at f =
10 Khz (FB)
Maximum duty cycle
1.2
1.45
V
Total device
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
I
CCS
Standby
supply
current Off-state
2.5
3.0
mA
I
CCA
Average
supply
current R
T
= 10 k
2.8
3.5
mA
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