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PDF PT4201ESOH Data sheet ( Hoja de datos )
| Número de pieza | PT4201ESOH | |
| Descripción | Current-mode PWM Controller | |
| Fabricantes | PowTech | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PT4201ESOH (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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PT4201
Current-mode PWM Controller
GENERAL DESCRIPTION
PT4201 is a highly integrated current mode PWM
controller， providing low standby power and cost
effective system solution for the sub 30W flyback
converter applications. It is also suitable for high
precision and high reliable LED lighting applications.
It features power saving operation at no load or light
load condition, PWM frequency is reduced to minimize
switching loss and low standby power and high
efficiency is thus achieved. PT4201 also features low
VDD startup current which also contributes to low
standby power. The built in LEB on the current sense
input removes the signal glitch due to snubber circuit
diode reverse recovery thus reduce the external
component count and system cost in the design.
Rich protection is implemented in PT4201 including
cycle-by-cycle current limiting (OCP), over load
protection (OLP), VDD over voltage clamp and under
voltage lockout (UVLO). Gate drive output is clamped
at 18V to protect the power MOSFET. By limiting the
minimum frequency above 22 kHz eliminates the
potential audible noise when the system works under
light or no load conditions.
Excellent EMI performance is achieved with
C.R.PowTech proprietary frequency Jittering technique
together with soft driving control at totem pole gate
drive output.
The PT4201 is available in SOT23-6, SOP-8 and DIP-8
packages.
FEATURES
z Frequency Jittering for Improved EMI
Performance
z Green-Mode PWM for Improved Efficiency and
Minimum standby power design
z Low start up current 20uA ( Typ. 3uA) and Low
operation current 2mA (Typ. 1mA)
z Current mode operation
z Leading-edge blanking on current sense input
z Programmable PWM frequency
z Constant output power limit for universal AC
input
z Built-in power limit control (OLP)
z Cycle-by-cycle current limiting (OCP)
z Under voltage lockout (UVLO)
z GATE output maximum voltage clamped at 18V
z Totem pole output includes soft driving for
better EMI
APPLICATIONS
Offline AC/DC flyback converter for
z Power Adapter
z Open-frame SMPS
z Battery Charger Adapter
z 1W-30W HB LED lighting.
ORDERING INFORMATION
PACKAGE
SOT23-6, Pb free
DIP8, Pb free
SOP8, Pb free
Note:
TEMPERATURE
RANGE
-40℃ to 85℃
-40℃ to 85℃
-40℃ to 85℃
ORDERING PART
NUMBER
PT4201E23F
PT4201EDIH
PT4201ESOH
TRANSPORT
MEDIA
Tape and Reel
Tube
Tape and Reel
MARKING
4201
PT4201
xxxxxX
PT4201
xxxxxX
xxxxxX
Assembly Factory Code
Lot Number
PT4201_DS Rev EN_2.0
www.micro-bridge.com
Page 1
1 page  
PT4201
Current-mode PWM Controller
ELECTRICAL CHARACTERISTICS (Continued)
SYMBOL
FDT
FDV
PARAMETER
Oscillator Frequency Stability
At Different Temperature
Oscillator Frequency Stability
At Different VDD Input Level
TEST CONDITION
VDD=16V,
RI=100Kohm
-20oC 到 100oC
VDD=12~25V,
RI=100Kohm
MIN TYP MAX UNIT
2%
2%
PWM SECTION
AV
TBLK
DMAX
DMIN
PWM Input GAIN
Leading Edge Blanking Time
PWM Maximum Duty Cycle
PWM Minimum Duty Cycle
△VFB/△VCS
2.0
300
75
0
V/V
ns
%
%
CURRENT SENSE INPUT (SENSE)
ZCS
VTH_OC
TOC_DELAY
SENSE Input Impendence
80 Kohm
OCP Threshold at Duty=0
FB=3V, VGATE<0.3V
0.70 0.75 0.80
Delay Time From OCP to VDD=16V,
Gate Output OFF
CS>VTH_OC
，
100
CGATE=1000pF
V
nS
GATE OUTPUT
VOL
VOH
T_r
T_f
VGMAX
GATE Output Low Level
VDD=16V, Io=-20mA
0.8
GATE Output High Level
VDD=16V, Io=20mA
10
GATE Output Rising time
VDD=16V, CL=1000pF
220
GATE Output Falling Time
VDD=16V, CL=1000pF
70
GATE Output Clamp Voltage
18
V
V
nS
nS
V
PT4201_DS Rev EN_2.0
www.micro-bridge.com
Page 5
5 Page 
PT4201
Current-mode PWM Controller
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Fosc vs. RI
140
120
100
80
60
40
20
0
50 70 90 110 130 150 170 190
RI（Kohm）
79.0%
DMAX Vs.Temperature Ri=100K
78.0%
77.0%
76.0%
75.0%
74.0%
73.0%
72.0%
71.0%
-20
0
20 40 60 80
Temp（C）
100
120
0.800
Voc Vs. Temperature
0.780
0.760
0.740
0.720
0.700
-20
0
20 40 60 80
Temp（C）
100 120
Fosc vs. VDD Ri=100K
70.00
69.00
68.00
67.00
66.00
65.00
64.00
63.00
62.00
61.00
60.00
10.00 12.00 14.00 16.00 18.00 20.00 22.00 24.00
VDD（V）
PT4201_DS Rev EN_2.0
www.micro-bridge.com
Page 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet PT4201ESOH.PDF ] | |
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