DataSheet.es    


PDF FSEZ1317 Data sheet ( Hoja de datos )

Número de pieza FSEZ1317
Descripción (EZ-PSR for 2-Chip Product) Primary-Side-Regulation PWM
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de FSEZ1317 (archivo pdf) en la parte inferior de esta página.


Total 17 Páginas

No Preview Available ! FSEZ1317 Hoja de datos, Descripción, Manual

www.DataSheet4U.com
May 2010
FSEZ1317 (EZ-PSR for 2-Chip Product)
Primary-Side-Regulation PWM with POWER MOSFET
Integrated
Features
ƒ Low Standby Power Under 30mW
ƒ High-Voltage Startup
ƒ Fewest External Component Counts
ƒ Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
ƒ Green-Mode: Linearly Decreasing PWM Frequency
ƒ Fixed PWM Frequency at 50kHz with Frequency
Hopping to Solve EMI Problem
ƒ Cable Compensation in CV Mode
ƒ Peak-Current-Mode Control in CV Mode
ƒ Cycle-by-Cycle Current Limiting
ƒ VDD Over-Voltage Protection with Auto Restart
ƒ VDD Under-Voltage Lockout (UVLO)
ƒ Gate Output Maximum Voltage Clamped at 15V
ƒ Fixed Over-Temperature Protection with
Auto Restart
ƒ Available in the 7-Lead SOP and DIP Packages
Description
This third-generation Primary Side Regulation (PSR)
and highly integrated PWM controller provides several
features to enhance the performance of low-power
flyback converters. The proprietary topology,
TRUECURRENT™, of FSEZ1317 enables precise CC
regulation and simplified circuit design for battery-
charger applications. A low-cost, smaller, and lighter
charger results, as compared to a conventional design
or a linear transformer.
To minimize standby power consumption, the
proprietary green mode provides off-time modulation to
linearly decrease PWM frequency under light-load
conditions. Green mode assists the power supply in
meeting power conservation requirements.
By using the FSEZ1317, a charger can be implemented
with few external components and minimized cost. A
typical output CV/CC characteristic envelope is shown
in Figure 1.
Applications
ƒ Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, power tools, etc.
ƒ Replaces linear transformers and RCC SMPS
Figure 1. Typical Output V-I Characteristic
Ordering Information
Part Number
FSEZ1317MY
FSEZ1317NY
Operating
Temperature Range
-40°C to +105°C
-40°C to +105°C
Package
7-Lead, Small Outline Package (SOP-7)
7-Lead, Dual Inline Package (DIP-7)
Packing
Method
Tape & Reel
Tube
© 2009 Fairchild Semiconductor Corporation
FSEZ1317 • Rev. 1.0.4
www.fairchildsemi.com

1 page




FSEZ1317 pdf
Electrical Characteristics
Unless otherwise specified, VDD=15V and TA=25.
Symbol
Parameter
VDD Section
VOP Continuously Operating Voltage
VDD-ON Turn-On Threshold Voltage
VDD-OFF Turn-Off Threshold Voltage
IDD-OP
Operating Current
IDD-GREEN Green-Mode Operating Supply Current
VDD-OVP VDD Over-Voltage-Protection Level (OVP)
VDD-OVP-HYS Hysteresis Voltage for VDD OVP
tD-VDDOVP VDD Over-Voltage-Protection Debounce Time
HV Startup Current Source Section
VHV-MIN Minimum Startup Voltage on HV Pin
IHV Supply Current Drawn from HV Pin
IHV-LC
Leakage Current after Startup
Oscillator Section
fOSC Frequency
Center Frequency
Frequency Hopping Range
fOSC-N-MIN Minimum Frequency at No-Load
fOSC-CM-MIN Minimum Frequency at CCM
fDV Frequency Variation vs. VDD Deviation
fDT Frequency Variation vs. Temperature Deviation
Voltage-Sense Section
Itc IC Bias Current
VBIAS-COMV Adaptive Bias Voltage Dominated by VCOMV
Current-Sense Section
tPD Propagation Delay to GATE Output
tMIN-N
VTH
Minimum On Time at No-Load
Threshold Voltage for Current Limit
Voltage-Error-Amplifier Section
VVR Reference Voltage
VN Green-Mode Starting Voltage on EA_V
VG Green-Mode Ending Voltage on EA_V
Current-Error-Amplifier Section
VIR Reference Voltage
Cable Compensation Section
VCOMR COMR Pin for Cable Compensation
www.DataSheet4U.com
Conditions Min. Typ. Max. Units
23 V
15 16 17
V
4.5 5.0 5.5
V
2.5 5.0 mA
0.95 1.20 mA
24 V
1.5 2.0 2.5
V
50 200 300 µs
VDC=100V
HV=500V,
VDD= VDD-
OFF+1V
50 V
1.5 3.0 mA
0.96 3.00 µA
47 50 53
kHz
±1.5 ±2.0 ±2.5
370 Hz
13 kHz
VDD=10~25V,
1 2%
TA=-40°C to
105°C
15 %
RVS=20k
10 µA
1.4 V
90 200 ns
700 850 1050 ns
0.8 V
fOSC-2kHz
fOSC=1kHz
2.475
2.500
2.5
0.4
2.525
V
V
V
2.475 2.500 2.525 V
0.75 V
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FSEZ1317 • Rev. 1.0.4
5
www.fairchildsemi.com

5 Page





FSEZ1317 arduino
Cable Voltage Drop Compensation
In cellular phone charger applications, the battery is
located at the end of cable, which typically causes
several percentage of voltage drop on the battery
voltage. FSEZ1317 has a built-in cable voltage drop
compensation that provides a constant output voltage at
the end of the cable over the entire load range in CV
mode. As load increases, the voltage drop across the
cable is compensated by increasing the reference
voltage of the voltage regulation error amplifier.
www.DataSheet4U.com
Operating Current
The FSEZ1317 operating current is as small as 2.5mA,
which results in higher efficiency and reduces the VDD
hold-up capacitance requirement. Once FSEZ1317
enters “deep” green mode, the operating current is
reduced to 0.95mA, assisting the power supply in
meeting power conservation requirements.
Green-Mode Operation
The FSEZ1317 uses voltage regulation error amplifier
output (VCOMV) as an indicator of the output load and
modulates the PWM frequency as shown in Figure 26.
The switching frequency decreases as the load
decreases. In heavy load conditions, the switching
frequency is fixed at 50kHz. Once VCOMV decreases
below 2.5V, the PWM frequency linearly decreases from
50kHz. When FSEZ1317 enters deep green mode, the
PWM frequency is reduced to a minimum frequency of
370Hz, thus gaining power saving to meet international
power conservation requirements.
Figure 27. Frequency Hopping
High-Voltage Startup
Figure 28 shows the HV-startup circuit for FSEZ1317
applications. The HV pin is connected to the line input or
bulk capacitor through a resistor, RSTART (100k
recommended). During startup status, the internal
startup circuit is enabled. Meanwhile, line input supplies
the current, ISTARTUP, to charge the hold-up capacitor,
CDD, through RSTART. When the VDD voltage reaches
VDD-ON, the internal startup circuit is disabled, blocking
ISTARTUP from flowing into the HV pin. Once the IC turns
on, CDD is the only energy source to supply the IC
consumption current before the PWM starts to switch.
Thus, CDD must be large enough to prevent VDD from
dropping down to VDD-OFF before the power can be
delivered from the auxiliary winding.
Figure 26. Switching Frequency in Green Mode
Frequency Hopping
EMI reduction is accomplished by frequency hopping,
which spreads the energy over a wider frequency range
than the bandwidth measured by the EMI test
equipment. FSEZ1317 has an internal frequency
hopping circuit that changes the switching frequency
between 47kHz and 53kHz over the period shown in
Figure 27.
© 2009 Fairchild Semiconductor Corporation
FSEZ1317 • Rev. 1.0.4
11
18
27
3
45
Figure 28. HV Startup Circuit
www.fairchildsemi.com

11 Page







PáginasTotal 17 Páginas
PDF Descargar[ Datasheet FSEZ1317.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
FSEZ1317(EZ-PSR for 2-Chip Product) Primary-Side-Regulation PWMFairchild Semiconductor
Fairchild Semiconductor
FSEZ1317APrimary-Side-Regulation PWMFairchild Semiconductor
Fairchild Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar