UC3883L-AG6-A-R [UTC]
Switching Regulator/Controller,;
| 型号： | UC3883L-AG6-A-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | Switching Regulator/Controller, |
| 文件： | 总7页 (文件大小：287K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
UC3883
Preliminary
CMOS IC
HIGH PERFORMANCE
CURRENT MODE PWM
CONTROLLER WITH PEAK
LOAD
4
5
6
3
2
1
DESCRIPTION
UTC UC3883 is a highly integrated current mode PWM control
SOT-26
IC optimized for high performance, low standby power and cost
effective offline flyback converter applications.
PWM switching frequency at normal operation is internally fixed
and is trimmed to tight range. At no load or light load condition, the
IC operates in extended ‘burst mode’ to minimize switching loss.
Lower standby power and higher conversion efficiency is thus
achieved.
VCC low startup current and low operating current contribute to a
reliable power on startup and low standby design with UTC
UC3883.
UTC UC3883 offers complete protection coverage with
auto-recovery including Cycle-by-Cycle current limiting (OCP), over
load protection (OLP), over temperature protection (OTP) and VCC
under voltage lockout (UVLO). It also provides the over voltage
protection (OVP) protections with latched shut down. Excellent EMI
performance is achieved with UTC proprietary frequency shuffling
technique.
The tone energy at below 20KHZ is minimized in the design and
audio noise is eliminated during operation.
FEATURES
* Power on Soft Start Reducing MOSFET VDS Stress
* Frequency shuffling for EMI
* Extended Burst Mode Control For Improved Efficiency and
Minimum Standby Power Design
* Ultra Low Operating Current at Light Load (typical 0.6mA)
* Audio Noise Free Operation
* Normal 65KHz Switching Frequency
* Frequency Triple for peak load (180KHz)
* Adjustable Overload Protection (OLP) delay time
* Comprehensive Protection Coverage
VCC Under Voltage Lockout with Hysteresis (UVLO)
Cycle-by-cycle over current threshold setting for constant output
power limiting over universal input voltage range
Overload Protection (OLP) with autorecovery
External (if NTC resistor is connected at CT/RT pin) or internal (if
capacitor is connected at CT/RT pin) Over Temperature
Protection (OTP) with autorecovery.
VCC Over Voltage Protection (OVP) with latch shut down
www.unisonic.com.tw
1 of 7
Copyright © 2020 Unisonic Technologies Co., Ltd
QW-R103-174.b
UC3883
Preliminary
CMOS IC
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
UC3883L-AG6-A-R
UC3883L-AG6-B-R
UC3883G-AG6-A-R
UC3883G-AG6-B-R
SOT-26
SOT-26
Tape Reel
Tape Reel
UC3883G-AG6-A-R
(1) R: Tape Reel
(2) X: refer to PIN CONFIGURATION
(1)Packing Type
(2)Pin Assignment
(3)Green Package
(4)Package Type
(3) G: Halogen Free and Lead Free, L: Lead Free
(4) AG6: SOT-26
MARKING
6
5
4
U883
Pin Assignment
1
2
3
UNISONICTECHNOLOGIESCO.,LTD
2 of 7
QW-R103-174.b
www.unisonic.com.tw
UC3883
Preliminary
CMOS IC
PIN CONFIGURATION
GND
Gate
6
6
5
4
1
1
2
3
VCC
CS
FB
FB 2
CT/RT
5 VCC
CS
CT/RT
GND
3
4
Gate
UC3883-A
UC3883-B
PIN DESCRIPTION
PIN NO.
PIN NAME
DESCRIPTION
UC3883A
UC3883B
1
2
3
4
5
4
6
1
VCC
CS
Power Supply
Current sense input
Gate
GND
Totem-pole gate driver output for power MOSFET
Ground
Dual functions pin. Connecting a NTC resistor to ground for over
temperature control. Connecting a capacitor to ground sets OLP
delay time
5
6
3
2
CT/RT
FB
Feedback input pin. The PWM duty cycle is determined by voltage
level into this pin and the current-sense signal at Pin 4.
BLOCK DIAGRAM
VCC
+
+
-
VCC OVP
INTERNAL BIAS &
REFERENCE VOLTAGE
OVP1
30V
-
20V/8.2V
Burst_en
OTP_en
Internal OTP
PROTECTIONS
OUT
VCC OVP
CLK1
Delay
16V
OLP_en
1.05/1.15V
5.7V
+
-
Burst_en
5.7V
100uA
4.6V
-
OLP_en
OLP
+
FB
-
1V
OTP_en
OTP
2R
R
CT/RT
+
-
PWM
+
OSC1
CLK1
SLOPE
SLOPE
COMPENSATION
COMPENSATION
Q
S
R
LEB
OSC
+
CS
OCP
-
Vcsth
FB
GND
UNISONICTECHNOLOGIESCO.,LTD
3 of 7
QW-R103-174.b
www.unisonic.com.tw
UC3883
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VCC
RATINGS
-0.3 ~ 36
-0.3 ~ VCC+0.3
-0.3 ~ 6
UNIT
V
Supply Voltage
Input Voltage to OUT Pin
FB, CS, DEM
VOUT
V
V
Power Dissipation @ TA=+25°C
Junction Temperature
PD
TJ
400
mW
°C
°C
°C
+150
Operating Ambient Temperature
Storage Temperature Range
TOPR
TSTG
-40 ~ +125
-65 ~ +150
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VCC
RATINGS
9 ~ 28
UNIT
V
Supply Voltage
Start up Resistor
VCC Capacitor
0.86 ~ 4.4
2.2 ~ 4.7
MΩ
μF
THERMAL DATA
PARAMETER
SYMBOL
RATING
250
UNIT
°C/W
Junction to Ambient
θJA
ELECTRICAL CHARACTERISTICS (VCC=15V, TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
SUPPLY VOLTAGE
For UC3883A
18
20
22
V
V
VCC (ON)
VCC(ON)
For UC3883B
13.8 15.3 16.8
VCC (OFF)
VCC(MIN)
ISTR
7.2
8.2
1.5
0.85
0.5
30
9.2
5
V
Startup Current
VCC<VCC(ON)-0.5V
VFB=3V
μA
mA
mA
V
Operating Current
VCC OVP Threshold
IOP
VFB=Burst Level
VCC(OVP)
28
60
32
OSCILLATOR & SWITCHING FREQUENCY
Switching Frequency
Temperature Stability
Voltage Stability
F(SW)
65
70
10
10
KHz
%
FDT
FDV
Guaranteed by Design
VFB=3.9V
%
Green Mode Frequency
Frequency Spreading Range
Max.Duty Cycle
F(SW_GR)
ΔOSC
DCMAX
20
+9
70
KHz
%
-9
77
85
%
VOLTAGE FEEDBACK
Open Loop Voltage
VFB_Open
VFB_OLP
TD_OLP
5.00 5.40 5.80
4.60
V
V
OLP Level
OLP De-Bounce Time
Burst-Mode Enter FB Voltage
Burst-Mode Quit FB Voltage
FB Pin Short Current
VFB>5V
60
100 160
1.05
mS
V
VFB-IN
VFB-OUT
IFB_SHORT
1.15
V
130
μA
UNISONICTECHNOLOGIESCO.,LTD
4 of 7
QW-R103-174.b
www.unisonic.com.tw
UC3883
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Current Sensing
Current Limiting Threshold Voltage
Current Limiting Threshold Voltage
with 0% Duty
VCS_MAX
VCS_L
TLEB
Read cs pin in testmode
Read cs pin in testmode
Guaranteed by Design
Guaranteed by Design
0.88
0.43
350
V
V
Lead Edge Blanking Time
SDSP(Secondary Diode Short
Protection) CS pin Level
CS DCOVP Level
ns
V
VSCP
1.32
VCS_DCOVP Guaranteed by Design
Guaranteed by Design
0.44
10
V
Soft Start Time
mS
GATE DRIVE OUTPUT
Output Low Level
VOL
VOH
tR
VCC=15V, IOUT=-20mA
VCC=15V, IOUT=20mA
10% to 90% of VOUT, CL=1nF
90% to 10% of VOUT, CL=1nF
VCC=20V
1
V
V
Output High Level
9
Rising Time
200
60
nS
nS
V
Falling Time
tF
Out Clamping
Vclamp
15
CT/RT Detection
Td_OLP
CT=100nF
1
OLP De-bounce time
S
No capacitor connected to
CT/RT
Td_OLP_inner
12
OTP Threshold Level
Output current of CT/RT pin
OTP De-Bounce Time
THERMAL SHUT DOWN
OTP Threshold
VOTP
IRT
0.92 0.98 1.04
V
94
100
106
7
μA
TOTP
Guaranteed by Design
Times
150
°C
UNISONICTECHNOLOGIESCO.,LTD
5 of 7
QW-R103-174.b
www.unisonic.com.tw
UC3883
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
VACin
C4
R7
L1
EMI
VO
TX
FILTER
D1
Rst
1.5M
C5
R6
D2
Cbuk
C1
C3
Rst
1.5M
D4
D3
+
+
C10
10uF
C7
1uF
R3
R1
R4
UTC UC3883
C2
5
1
3
2
VCC
Gate
CS
CT/RT
GND
FB
D5
RG
M1
R5
4
6
TL431
R8
RNTC
R2
RCS
C6
CFB
R101
Fig.1 Application Circuit for ADJ-OTP
VACin
C4
R7
L1
EMI
VO
TX
FILTER
D1
Rst
1.5M
C5
R6
D2
Cbuk
C1
C3
Rst
1.5M
D4
D3
+
+
C10
10uF
C7
1uF
R3
R1
R4
UTC UC3883
C2
5
1
3
2
VCC
Gate
CS
CT/RT
GND
FB
D5
RG
M1
R5
4
6
TL431
R8
CT
R2
RCS
C6
CFB
R101
Fig.2 Application Circuit for ADJ-OLP-Debounce time(0~10s)
UNISONICTECHNOLOGIESCO.,LTD
6 of 7
QW-R103-174.b
www.unisonic.com.tw
UC3883
Preliminary
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all UTC products described or contained herein.
UTC products are not designed for use in life support appliances, devices or systems where malfunction
of these products can be reasonably expected to result in personal injury. Reproduction in whole or in
part is prohibited without the prior written consent of the copyright owner. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
UNISONICTECHNOLOGIESCO.,LTD
7 of 7
QW-R103-174.b
www.unisonic.com.tw
相关型号：
©2020 ICPDF网 联系我们和版权申明