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US1651 の電気的特性と機能

US1651のメーカーはUnisonic Technologiesです、この部品の機能は「PRIMARY-SIDE REGULATION PWM POWER SWITCH」です。


製品の詳細 ( Datasheet PDF )

部品番号 US1651
部品説明 PRIMARY-SIDE REGULATION PWM POWER SWITCH
メーカ Unisonic Technologies
ロゴ Unisonic Technologies ロゴ 




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US1651 Datasheet, US1651 PDF,ピン配置, 機能
UNISONIC TECHNOLOGIES CO., LTD
US1651
Preliminary
PRIMARY-SIDE REGULATION
PWM POWER SWITCH
CMOS IC
DESCRIPTION
The UTC US1651 is a primary control switch mode charger and
adapter applications. The controlled variable is transferred by an
auxiliary winding from the secondary to the primary side. The
device integrates PWM controller to enhance the performance of
discontinuous conduction mode (DCM) flyback converters.
The UTC US1651 operates in primary-side sensing and
regulation. Opto-coupler and TL431 could be eliminated. It
operates in fixed frequency mode at large load conditions,
frequency reduction mode at light/medium load and ‘Extended
burst mode’ at No/light load conditions. So that low standby power
can be achieved.
The UTC US1651 achieves high precision CV/CC regulation
and high power efficiency. It offers comprehensive protection
coverage with auto-recovery features including Cycle-by-cycle
current limiting, VDD over voltage protection, VDD clamp, OTP,
leading edge blanking, VDD under voltage lockout, etc.
SOP-8
FEATURES
* Programmable CV and CC regulation
* Primary-side sensing and regulation with No TL431 and
opto-coupler
* Multi-mode operation for high efficiency
* Adjustable constant current and output power setting
* Power on soft-start time (4ms)
* Frequency shuffling and adjustable gate drive greatly
improving EMI
* ”Extended burst mode control” for improved efficiency
and minimum standby design
* Built-in leading edge blanking (LEB)
* VDD under voltage lockout
* VDD over voltage shutdown and clamp
* Cycle-by-Cycle current limiting
* Fail-safe protection for open loop fault condition
* Auto-restart in over voltage condition
ORDERING INFORMATION
Ordering Number
US1651G-S08-R
Package
SOP-8
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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US1651 pdf, ピン配列
US1651
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Drain Voltage (Off State)
VDD Voltage
BVDSS
VDD
-0.3~650
-0.3~33
V
V
VDDG Voltage
VDD Zener Clamp Continuous Current
VDDG
IDD_clamp
-0.3~33
10
V
mA
CS Input Voltage
INV Input Voltage
VCS
Vinv
-0.3~7
-0.3~7
V
V
Operating Junction Temperature
Storage Temperature
TJ
TSTG
-20~150
-55~150
°C
°C
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.
ELECTRICAL CHARACTERISTICS (TA=25°C, VDD=VDDG=16V, unless otherwise specified)
PARAMETER
Supply Voltage (VDD) Section
Standby Current
Operation Current
VDD Under Voltage Lockout Enter
VDD Under Voltage Lockout Exit
Over Voltage Protection Voltage
IDD=10mA
Current Sense Input Section
LEB Time
VTH_OC_test
Propagation Delay
Input Impedance
Soft Start Time
CV Section
Normal Mode Frequency
Burst Mode Base Frequency
Frequency Shuffling Range
CC Section
Oscillation Frequency
Error Amplifier section
Reference Voltage for EA
DC Gain of the EA
Unity Gain Bandwidth
Power MOSFET Section
Mos Drain-Source Breakdown
Voltage
Static Drain to Source On
Resistance
OTP SECTION
Threshold Temperature of OTP
(Note)
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
IDD ST
IDD op
UVLO(ON)
UVLO(OFF)
OVP(ON)
VDD_clamp
VDD=13V
Operation Supply Current
INV=1.25V, CS=0V, VDD=VDDG=20V
CS=0V,INV=1V Ramp up VDD Until
Gate Clock is Off
7.5
14.0
28.5
5 10
1.0 2.0
8.5 9.5
15 16.0
30.0 31.5
33
μA
mA
V
V
V
V
TLEB
Vth_oc
Td_oc
ZSENSE_IN
T_ss
1.2 μs
780 820 860 mV
300 ns
50 K
4 ms
Freq
Freq_Burst
f/Freq
45 50 55 KHz
22 KHz
±4 %
Freq
Minimum frequency
Maximum frequency
12 KHz
50 KHz
VREF_EA
Gdc
GBW
1.21 1.25 1.29 V
50 dB
37.5 kHz
BVDSS
RDS(ON)
650 V
12
TOTP
+150
°C
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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US1651 電子部品, 半導体
US1651
Preliminary
CMOS IC
OPERATION DESCRIPTION (Cont.)
Adjustable Drive Capability
The internal power MOSFET in UTC US1651 is driven by a dedicated gate driver for power switch control. Too
weak the gate drive strength results in higher conduction and switch loss of MOSFET while too strong gate drive
compromises EMI. A good tradeoff is achieved through the built-in totem pole gate design with right output strength
control. The gate drive strength can be adjusted externally by a resistor connected between VDD and VDDG, The low
idle loss and good EMI system design is possible with this dedicated control scheme.
Protection Control
Good power supply system reliability is achieved with its comprehensive protection features including VDD
over-voltage protection, VDD Clamp, GATE Clamp, Power on soft start, Cycle-by-cycle current limiting, short circuit
protection, leading edge blanking, OTP and UVLO, etc.
VDD is supplied by transformer auxiliary winding output. The output of UTC US1651 is shutdown when VDD drops
below VTH(OFF) and the power converter enters power on start-up sequence thereafter.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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共有リンク

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部品番号部品説明メーカ
US1651

PRIMARY-SIDE REGULATION PWM POWER SWITCH

Unisonic Technologies
Unisonic Technologies
US1652

PRIMARY-SIDE REGULATION PWM POWER SWITCH

Unisonic Technologies
Unisonic Technologies


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