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PDF UC3800 Data sheet ( Hoja de datos )
| Número de pieza | UC3800 | |
| Descripción | LOW COST POWER-SAVING MODE PWM CONTROLLER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de UC3800 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
UC3800
Preliminary
LINEAR INTEGRATED CIRCUIT
LOW COST POWER-SAVING
MODE PWM CONTROLLER
FOR FLYBACK CONVERTERS
DESCRIPTION
The UTC UC3800 is a high performance current mode PWM
controller ideally suited for low standby power. High voltage startup
is implemented in UTC UC3800, which features with short startup
time and no standby current. At no load condition, the IC operates
in power-saving mode for lower standby power, decreasing
frequency for higher conversion efficiency at light load condition.
The internal slope compensation improves system stability at
high PWM duty cycle output. Leading-edge blanking on current
sense input removes the signal glitch, which offering minimal
external component count in the design. Excellent EMI
performance is achieved with UTC proprietary frequency hopping
technique (ZL201020615247.1) together with soft driver control.
Audio noise is eliminated due to switch frequency more than 20kHz
during operation.
The UTC UC3800 has such applications as: battery charger,
power adaptor, set-top box power supplies, ink jet printers,
open-frame SMPS.
SOP-8
FEATURES
* UTC proprietary frequency hopping technology for Improved EMI
performance.
* Power-saving mode for high light-load and standby efficiency
* Soft Start
* Dynamic peak current limiting for constant output power
* Built-in synchronized slope compensation
* OTP,OLP,OVP, LNO-OV, Brownout and VDD clamp for higher
security
* Fixed switch frequency 65kHz
* Gate output voltage clamped at 16V
* Low start-up current
* Cycle-by-cycle Current Limiting
* Under voltage lockout (UVLO)
* Few external components required
ORDERING INFORMATION
Ordering Number
UC3800G-S08-R
Package
SOP-8
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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UC3800
Preliminary
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (TA=25°C, VDD=16V，unless otherwise specified)
PARAMETER
SYMBOL
SUPPLY SECTION
Supply current from HV Pin
Start Up Current
IC Operating current
VDD Zener Clamp Voltage
IHV
ISTR
IOP1
VDD(CLAMP)
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold Voltage
Min. Operating Voltage
Hysteresis
VDD(ON)
VDD(OFF)
VDD(HY)
CONTROL SECTION
VFB Open Loop Voltage Level
PWM Input Gain
The FB threshold enter burst mode
The FB threshold exit burst mode
The FB threshold enter green mode
Switch Frequency
Normal
Power-Saving
VFB-OPEN
AVCS
VFB(IN)
VFB(OUT)
VFB(END)
FSW
Duty Cycle
Frequency Hopping
Frequency VDD Stability
Frequency Temperature Stability
DMAX
FJ(SW)
FDV
FDT
PROTECTION SECTION
VCC Over Voltage Protection Threshold
FB PIN Over Load Protection Threshold
Over Load Protection Delay-Time
Soft start time
OTP Level
VOVP
VOLP
TDelay
TSS
TOTP
CURRENT LIMITING SECTION
Peak Current Flat Threshold Voltage
Peak Current Valley Threshold Voltage
Lead Edge Blanking Time
VCS-F
VCS-V
TLEB
DRIVER OUTPUT SECTION
Output Voltage Low State
Output Voltage High State
Output clamp Voltage
VOL
VOH
V_Clamping
Output Voltage Rise Time
Output Voltage Fall Time
tR
tF
LNO SECTION
Threshold voltage for LNO
Threshold voltage for BNO
VTH_LNO
VTH_BNO
TEST CONDITIONS
HV=100V
VDD = VDD(ON)-0.1V
VFB=3.5V
IDD=20mA
∆VFB/∆VCS
VSENSE =0
VSENSE =0
VSENSE =0
VFB=3.5V, hopping Rang
Before enter burst mode
VFB=3.5V, VSENSE=0
VDD=12V~20V
T=-25~85°C
VFB=3.5V
VFB=3.5V, Duty≥60%
VFB=4.2V, Duty=0%
VDD=16V,IO=-20mA
VDD=16V,IO= 20mA
CL=1.0nF
CL=1.0nF
MIN TYP MAX UNIT
0.25 mA
2 15 μA
0.8 1.8 mA
31 33 35 V
12 13 14
678
6
V
V
V
5.0 5.4
V
3 V/V
1.5 V
1.8 V
2.9 V
60 65 70 KHz
19 22 25 KHz
70 78 85 %
-4 +4 %
5%
5%
26 27 28 V
4.3 V
80 88 96 mS
2.5 mS
145 °C
0.85 0.95 1.05
0.55 0.65 0.75
350
V
V
ns
0.8 V
11 V
16 V
100 ns
60 ns
1.05 V
0.3 V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 10
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet UC3800.PDF ] | |
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