AZ3842BM14-E1 [DIODES]
Switching Regulator/Controller;型号: | AZ3842BM14-E1 |
厂家: | DIODES INCORPORATED |
描述: | Switching Regulator/Controller |
文件: | 总14页 (文件大小:189K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
General Description
Features
The AZ3842B/3B/4B/5B are high performance fixed
frequency current-mode PWM controller series. The
difference between AZ384XA and AZ384XB is that
they have different start-up currents.
·
·
Start-up Current: 0.30mA for AZ3842B/44B
0.20mA for AZ3843B/45B
Robust V
Line/Load Regulation
REF
Low Line Regulation : 4mV
Low Load Regulation : 4mV
High Stability of Reference Voltage over a Full
These integrated circuits are optimized for off-line and
DC-DC converter applications with minimum external
components. They feature under-voltage lockout
(UVLO) circuit with low start-up current, trimmed
oscillator for precise duty cycle control, current sense
comparator providing maximum current limiting and a
totem pole output stage for increasing output current.
In addition, these ICs also feature accurate protection
against over-temperature, over-current and maximal
output power.
·
o
Temperature Range: 0.2mV/ C
·
·
Operating Frequency up to 500KHz
High PWM Frequency Stability over a Full Tem-
perature Range: 2.5%
High PWM Frequency Stability under a Full Sup-
ply Voltage Range: 0.2%
Accurate Over-temperature Protection with Hys-
teresis
UVLO with Hysteresis
·
·
·
The AZ3842B and AZ3844B have UVLO thresholds
of 16V(on) and 10V(off); The corresponding thresh-
olds for AZ3843B and AZ3845B are 8.4 V(on) and
7.6V(off).
Applications
·
·
·
·
·
·
Off-line Converter
DC-DC Converter
Voltage Adapter
CRT Monitor Power Supply
Desktop Power Supply
DVD/STB Power Supply
The AZ3842B and AZ3843B can operate approaching
100% duty cycle; AZ3844B and AZ3845B can operate
from zero to 50% duty cycle.
These ICs are available in 3 packages: SOIC-8, DIP-8
and SOIC-14.
SOIC-14
SOIC-8
DIP-8
Figure 1. Package Types of AZ3842B/3B/4B/5B
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
1
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Pin Configuration
M14 Package
(SOIC-14)
P/M Package
(DIP-8/SOIC-8)
COMP
N/C
1
2
3
4
5
6
7
14
VREF
13
12
11
10
9
N/C
COMP
1
8
VREF
VFB
VCC
VFB
ISENSE
RT/CT
2
3
4
7
6
5
VCC
N/C
PWR VC
OUTPUT
GND
OUTPUT
GND
ISENSE
N/C
RT/CT
8
PWR GND
Figure 2. Pin Configuration of AZ3842B/3B/4B/5B (Top View)
Pin Description
Pin Number
Pin Name
Function
8-pin
14-pin
1
2
1
3
COMP
VFB
This pin is the Error Amplifier output and is made available for loop compensation.
The inverting input of the Error Amplifier. It is normally connected to the switching
power supply output through a resistor divider.
3
4
5
7
ISENSE
RT/CT
A voltage proportional to inductor current is connected to this input. The PWM uses
this information to terminate the output switch conduction.
The Oscillator frequency and maximum output duty cycle are programmed by con-
necting resistor RT to VREF and capacitor CT to ground. Operation to 500 kHz is pos-
sible.
5
6
GND
The combined control circuitry and power ground.
10
OUTPUT
This output directly drives the gate of a power MOSFET. Peak currents up to 1.0 A
are sourced and sunk by this pin.
7
8
12
14
VCC
The positive supply of the control IC.
VREF
This is the reference output. It provides charging current for capacitor CT through
resistor RT.
8
PWR GND
PWR VC
This pin is a separate power ground return that is connected back to the power source.
It is used to reduce the effects of switching transient noise on the control circuitry.
11
The High Output Voltage (VOH) is set by the voltage applied to this pin. With a sepa-
rate power source connection, it can reduce the effects of switching transient noise on
the control circuitry.
9
GND
N/C
This pin is the control circuitry ground return and is connected back to the power
source ground.
2,4,6,13
No connection. These pins are not internally connected.
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
2
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Functional Block Diagram
V
V
V
(PWR V )
CC C
CC
7(11)
8(14)
7(12)
5(9)
34V
UVLO
5V
REF
S/R
REF
GND
INTERNAL
BIAS
2.50V
VREF
GOOD
LOGIC
OUTPUT
6(10)
5(8)
4(7)
OSC
T
R /C
T
T
(Note)
GND
(PWR GND)
OVER TEMP
PROTECT
ERROR
AMP
S
R
2R
V
2(3)
1(1)
FB
PWN
LATCH
A(B)
A for 8-pin
B for 14-pin
1V
R
COMP
CURRENT
SENSE
COMPARATOR
Note: Toggle flip-flop used
for 3844B/45B only
3(5)
I
SENSE
Figure 3. Functional Block Diagram of AZ3842B/3B/4B/5B
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
3
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Ordering Information
AZ384XB
-
E1: Lead Free
Blank: Tin Lead
Circuit Type
TR: Tape and Reel
Blank: Tube
Package
M: SOIC-8
P: DIP-8
M14: SOIC-14
Part Number
Marking ID
Tempera-
ture Range
Packing
Type
Package
Tin Lead
Lead Free
Tin Lead
3842/3/4/5BM
3842/3/4/5BM
Lead Free
AZ3842/3/4/5BM
AZ3842/3/4/5BMTR
AZ3842/3/4/5BM-E1
3842/3/4/5BM-E1
3842/3/4/5BM-E1
Tube
-40 to 85oC
-40 to 85oC
-40 to 85oC
SOIC-8
DIP-8
AZ3842/3/4/5BMTR-E1
Tape &
Reel
AZ3842/3/4/5BP
AZ3842/3/4/5BP-E1
AZ3842/3/4/5BP
AZ3842/3/4/5BP-E1
Tube
Tube
AZ3842/3/4/5BM14
AZ3842/3/4/5BM14-E1
AZ3842/3/4/5BM14 AZ3842/3/4/5BM14-E1
SOIC-14
AZ3842/3/4/5BM14TR AZ3842/3/4/5BM14TR-E1 AZ3842/3/4/5BM14 AZ3842/3/4/5BM14-E1
Tape &
Reel
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
4
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Absolute Maximum Ratings (Note 1, 2)
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
30
V
Output Current
IO
A
± 1
-0.3 to 6.3
10
Analog Inputs (8-pin: pin2,3, 14-pin: pin3,5)
Error Amp Output Sink Current
V(ANA)
V
I
SINK(E.A)
mA
Power Dissipation at TA< 25 oC (DIP-8)
Power Dissipation at TA<25 oC (SOIC-8)
P
P
P
D (Note 3)
D (Note 3)
D (Note 3)
TJ
1000
460
mW
mW
mW
Power Dissipation at TA<25 oC (SOIC-14)
Junction Operating Temperature
725
oC
oC/W
oC/W
oC
-40 to 150
140
Thermal Resistance (Junction to Ambient)
DIP-8 Package
SOIC-8 Package
TSTG
160
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
ESD (Machine Mode)
-65 to 150
+300
oC
V
TLEAD
250
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indi-
cated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended
periods may affect device reliability.
Note 2: All voltages are with respect to pin 5 and all currents are positive into specified terminal.
Note 3: Board thickness 1.6mm, board dimension 90mm x 90mm.
Recommended Operating Conditions
Symbol
Parameter
Min
Max
500
85
Unit
f
Oscillation Frequency
Ambient Temperature
KHz
o
TA
-40
C
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
5
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Electrical Characteristics
o
(V =15V(Note 4), R =10kΩ C =3.3nF, T = -40 to 85 C, unless otherwise specified.)
CC
T
T
A
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
REFERENCE SECTION
Reference Output Voltage
Total Output Variation
Line Regulation
TJ=25oC, IREF=1mA
Line, Load, Temp.
12V ≤ VCC ≤25V
VREF
4.90
4.9
5.00
5.10
5.10
15
V
V
∆VREF
∆VREF
ISC
4
4
mV
mV
mA
Load Regulation
1mA ≤ IREF ≤20mA
15
TA=25oC
Short Circuit Output Current
Temperature Stability
OSCILLATOR SECTION
Oscillation Frequency
Oscillator Amplitude
Temperature Stability
Voltage Stability
-100
0.2
-180
0.4
mV/oC
TJ=25oC
f
47
52
1.7
2.5
0.2
57
KHz
V
VOSC
Pin 4, peak to peak (Note 7)
(Note 7)
%
1
%
12V ≤VCC ≤25V
Discharge Current
Vpin 4 =2V(Note 8)
8.5
10.5
mA
ERROR AMPLIFIER SECTION
Input Voltage
VI
Vpin 1=2.5V
2.45
2
2.50
6
2.55
1.1
V
mA
mA
V
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Voltage Gain
ISINK
Vpin1=1.1V
ISOURCE
VOH
Vpin1=5V
-0.5
5
-0.8
6
RL=15kΩ to GND
RL=15kΩ to pin 8
2V ≤ VO ≤ 4V
12V ≤ VCC ≤ 25V
VOL
0.7
90
70
V
65
60
dB
dB
Power Supply Rejection Ratio
CURRENT SENSE SECTION
Maximum Input Signal
Gain
PSRR
VI(MAX)
GV
Vpin1=5V(Note 5)
0.9
1
3
1.1
V
V/V
dB
ns
(Note 5, 6)
2.85
3.15
Power Supply Rejection Ratio
Delay to Output
PSRR
12V ≤ VCC ≤ 25V (Note 5, 7)
Vpin3 = 0 to 2V (Note 7)
70
150
-3
300
-10
Input Bias Current
IBIAS
µA
OUTPUT SECTION
Low Output Voltage
ISINK = 20mA
0.1
1.4
14
13
50
50
0.4
2.2
V
V
V
V
ns
ns
VOL
ISINK = 200mA
ISOURCE = 20mA
ISOURCE = 200mA
High Output Voltage
13
12
VOH
TJ=25oC, CL=1nF (Note 7)
TJ=25oC, CL=1nF (Note 7)
Rise Time
Fall Time
tR
tF
150
150
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
6
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
UNDER -VOLTAGE LOCKOUT SECTION
Start Threshold
VTH(ST)
AZ3842B/AZ3844B
AZ3843B/AZ3845B
AZ3842B/AZ3844B
AZ3843B/AZ3845B
15
7.8
8.5
7.0
16
8.4
17
9.0
V
V
V
V
Min. Operation Voltage
(After Turn On)
VOPR
10.0
7.6
11.5
8.2
(Min.)
PWM SECTION
D(Max.)
D(Max.)
D(Min.)
AZ3842B/AZ3843B
AZ3844B/AZ3845B
95
46
97
48
100
50
0
%
%
%
Max. Duty Cycle
Min. Duty Cycle
TOTAL STANDBY CURRENT SECTION
Start-Up Current
IST
AZ3842B/AZ3844B
AZ3843B/AZ3845B
Vpin3=Vpin2=0V
ICC=25mA
0.3
0.2
10
0.5
0.4
14
mA
mA
mA
V
Operating Supply Current
Zener Voltage
ICC(OPR)
VZ
30
34
OVER-TEMPERATURE PROTECT SECTION
oC
oC
Shutdown Temperature
Temperature Hysteresis
TSHUT
THYS
(Note 7)
(Note 7)
155
25
Note 4: Adjust V above the start-up threshold before setting it to 15V.
CC
Note 5: Parameters are tested at trip point of latch with Vpin2 = 0.
∆VPin 1
Note 6: Here gain is defined as:
A=
, 0 ≤ Vpin3 ≤ 0.8V
∆VPin 3
Note 7: These parameters, although guaranteed, are not 100% tested in production.
Note 8: This parameter is measured with RT=10kΩ to V it contributes 0.3mA of current to the measured value.
REF,
So the total current flowing into the CT pin will be 0.3mA higher than the measured value approximately.
VREF
RT
AP384XB
4.7k
2N2222
100k
A
VCC
1
2
3
4
VREF
8
7
6
5
COMP
1k
VCC
VFB
ERROR AMP
ADJUST
1K
1W
0.1µF
5k
ISENSE
ADJUST
OUTPUT
ISENSE
OUTPUT
GND
4.7k
0.1µF
GND
RT/CT
CT
Figure 4. Basic Test Circuit
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
7
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Electrical Characteristics (Continued)
Figure 4 is the basic test circuit for AZ384XB. In testing, the high peak currents associated with capacitive loads necessitate
careful grounding techniques. Timing and bypass capacitors should be connected close to pin 5 in a single point ground. The
transistor and 5k potentiometer are used to sample the oscillator waveform and apply an adjustable ramp to pin 3.
Typical Performance Characteristics
100k
50K
30
10
3
1
10k
5K
0.3
1
10
22
100
100
1k
10k
100k
1M
47
2.2
4.7
Frequency (Hz)
Timing Capacitor (nF)
Figure 5. Oscillator Dead Time vs. Timing Capacitor
Figure 6. Timing Resistor vs. Frequency
5.015
0.35
0.30
0.25
0.20
0.15
0.10
VCC=15V, IO=1mA
5.010
5.005
5.000
4.995
4.990
4.985
4.980
AZ3842B/44B
AZ3843B/45B
-40
-20
0
20
40
60
80
100
120
-25
0
25
50
75
100
125
-40
Ambient Temperature (oC)
Ambient Temperature (oC)
Figure 7. Reference Voltage vs. Ambient Temperature
Figure 8. Start-up Current vs. Ambient Temperature
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
8
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Typical Performance Characteristics (Continued)
16
4.0
3.5
15
14
VCC=15V, TA=25oC
VCC=15V
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
13
12
11
10
9
8
7
6
-40
0
50 100 150 200 250 300 350 400 450 500 550 600
Output Sink Current (mA)
-20
0
20
40
60
80
100
120
Ambient Temperature (oC)
Figure 9. Supply Current vs. Ambient Temperature
Figure 10. Output Saturation Characteristics
90
80
VCC=15V, TA=25oC
70
60
50
40
30
20
10
0
10
100
1k
10k
100k
1M
Frequency (Hz)
Figure 11. Error Amplifier Open-loop Frequency Response
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
9
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Typical Application
NTC
Bridge Diode
1N4007*4
C2
2200p
600V
R3
39k
2W
+
R2
270k
C14
100µ/400V
D3
8TQ100
L3
4.5µ
C11
1µ
C9
2200µ
C10
1000µ
C12
10µ
Z2
SA12A
J1
AC 85-265V
T
D1
+
+
Byv26e
C1 47µ
R4 47
D2
1N4148
J2
12V/5A
C3
0.1µ
7
2
1
5
8
VCC
VREF
R12
10
R5
10k
C4
2.2n
C8
VFB
RT/CT
4
6
3
C5
0.22µ
C15
100p
220p
R6
10
C6
2200p/600V
R16
8.2k
R15
100
COMP OUTPUT
R14
130k
Q1
IRF830
R7
1k
GND
ISENSE
W1
1k
U3
AZ431
R18
3.9k
C7
680p
U1
AZ3842B/3B/4B/5B Z1
1N5819
R10
0.51/1W
R9
7.5k
R13
15k
R17
2k
R11
820
U2 PC817
Figure 12. Typical Application of AZ3842B/3B/4B/5B
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
10
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Mechanical Dimensions
SOIC-8
Unit: mm(inch)
4.800(0.189)
5.000(0.197)
0.320(0.013)
1.350(0.053)
1.750(0.069)
0.675(0.027)
0.725(0.029)
D
5.800(0.228)
6.200(0.244)
1.270(0.050)
TYP
D
20:1
φ
0.800(0.031)
0.200(0.008)
0.100(0.004)
0.300(0.012)
0°
8°
1.000(0.039)
3.800(0.150)
4.000(0.157)
1°
5°
0.330(0.013)
0.510(0.020)
0.900(0.035)
6)
00
(0.
50
.1
R0
0.190(0.007)
0.250(0.010)
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
11
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Mechanical Dimensions (Continued)
SOIC-14
Unit: mm(inch)
0.280(0.011)
0.480(0.019)×45°
×45°
A
0.700(0.028)
0.100(0.004)
0.250(0.010)
0°
8°
8.550(0.337)
8.750(0.344)
3.800(0.150)
4.000(0.157)
0.330(0.013)
0.510(0.020)
1.270(0.050)
A
0.250(0.010)
20:1
0.200(0.008)M
IN
R0.200(0.008)
R0.200(0.008)
0.500(0.020)
0.600(0.024)
0.250(0.010)
2.000(0.079)
Depth 0.060(0.002)
0.100(0.004)
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
12
Preliminary Datasheet
CURRENT MODE PWM CONTROLLER
AZ3842B/3B/4B/5B
Mechanical Dimensions (Continued)
DIP-8
Unit: mm(inch)
0.700(0.028)
7.620(0.300)TYP
5°
1.524(0.060) TYP
6°
3.200(0.126)
3.600(0.142)
3.710(0.146)
4.310(0.170)
0.510(0.020)MIN
3.000(0.118)
3.600(0.142)
0.204(0.008)
0.360(0.014)
0.254(0.010)TYP
8.200(0.323)
9.400(0.370)
2.540(0.100)TYP
0.130(0.005)MIN
0.360(0.014)
0.560(0.022)
6.200(0.244)
6.600(0.260)
R0.750(0.030)
Φ3.000(0.118)
Depth
0.100(0.004)
0.200(0.008)
9.000(0.354)
9.400(0.370)
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
13
http://www.bcdsemi.com
BCD Semiconductor Corporation
3170 De La Cruz Blvd, Suite # 105 Santa Clara, CA 95054-2411, U.S.A
Tel: +1-408-988 6388, Fax: +1-408-988 6386
Tel: +86-21-6485-1491, Fax: +86-21-5450-0008
Tel: +86-21-6495 9539, Fax: +86-21-6485 9673
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
800 Yi Shan Road, Shanghai 200233, PRC
Advanced Analog Circuits (Shanghai) Corporation
8F, B Zone, 900 Yi Shan Road, Shanghai 200233, PRC
BCD Semiconductor (Taiwan) Company Limited
Room 2210, 22nd Fl, 333, Keelung Road, Sec. 1, TaiPei (110), Taiwan
Tel: +886-2-2758 6828, Fax: +886-2-2758 6892
IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any pro-
ducts or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for
use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any
liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limi-
ted does not convey any license under its patent rights or other rights nor the rights of others.
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SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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