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PDF FR9810 Data sheet ( Hoja de datos )
| Número de pieza | FR9810 | |
| Descripción | 500KHz Synchronous PWM-Buck DC/DC Converter | |
| Fabricantes | Fiti | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FR9810 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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fitipower integrated technology lnc. Preliminary
FR9810
21V, 6A, 500KHz Synchronous PWM-Buck
DC/DC Converter
Description
FR9810 is a high-efficiency synchronous mode
step-down DC/DC converter that employs a special
process technique to obtain very low RDS(ON) for
the internal metal–oxide–semiconductor field-effect
transistor (MOSFET), with operation voltage in a
wide 4.75V to 21V input voltage range. The output
current is over 6A, and the efficiency is over 90%.
Controller circuit design by a particular current mode
operation provides fast transient response and
eases loop stabilization.
This product has a very low standby current less
than 1µA in shutdown mode. When the
pin
voltage is less than 0.4V, FR9810 will turn off the
switching voltage regulator function and enter the
standby mode. Fault protection includes current
protect mode over current protection (OCP), voltage
protect mode under voltage lockout protection
(UVLO), and internal thermal shutdown.
This high-efficiency current mode step-down “Green
Power Converter” Fitipower offers the standard
small-outline integrated chip (SOIC) package with an
exposed pad.
Features
● Internal MOSFET RDS(ON) (high side/low side):
120mΩ/20mΩ typ.
● Operation voltage: 4.75V to 21V
● Continuous output current support: 6A
● Feedback voltage: 0.805V
● High efficiency (up to 90%)
● Oscillation frequency (typical): 500 KHz
● Sync to external clock from 300 KHz to 800 KHz
● Internal compensation
● OCP/UVLO protection
● Over Temperature Protection (OTP) with hiccup
mode
● < 1µA shutdown current
● Thermal Enhanced SOP-8(Exposed Pad)
Package
● RoHS Compliant
Applications
● Networking equipment
● OLPC, Netbooks
● Distributed power systems
● LCD monitors/TVs/STBs
● External HDDs
● Security Systems
Pin Assignments
SP Package (SOP- 8 Exposed pad )
Ordering Information
FR9810□□□
TR: Tape / Reel
G: Green
Package Type
SP: SOP-8(Exposed Pad)
Figure 1. Pin Assignment of FR9810
FR9810-Preliminary 0.1-FEB-2011
1
1 page  
fitipower integrated technology lnc. Preliminary
FR9810
Electrical Characteristics
(VIN=12V, TA=25℃, unless otherwise specified.)
Parameter
Symbol
Conditions
Input Supply Voltage
VIN Shutdown Supply Current
VIN Quiescent Supply Current
Feedback Voltage
High-Side MOSFET RDS(ON) (Note2)
Low-Side MOSFET RDS(ON) (Note2)
VIN
ISD V = 0V
IDDQ
V = 2 V, VFB = 1 V
VFB 4.75V≦VIN≦21V
HSRDS(ON)
LSRDS(ON)
MOSFET Leakage Current
High-Side MOSFET
(Note2)
Maximum Duty Cycle
Current
Limit
ILX(Leak)
ILIMIT
DMAX
V =0V, VLX = 0V
VFB = 0.7 V
Oscillation frequency
FLX
Short-Circuit Oscillation Frequency
FLX(Short) VFB = 0.3 V
Sync Frequency Range
FSYNC
Input UVLO Threshold
Under Voltage Lockout
Hysteresis
Input Low Voltage
VUVLO(Vth) VIN Rising
Threshold VUVLO(Hys)
V (L)
Input High Voltage
V (H)
Input Current
VCC Regulator
Soft-Start Time
Thermal Shutdown Threshold (Note 2)
Note2：Not production tested.
I
VCC
TSS
TSD
V =2V
Min
4.75
780
Typ Max
21
1
1.1
805 830
120
20
0 10
Unit
V
µA
mA
mV
mΩ
mΩ
µA
8.5 A
90 %
350 500 650 KHz
125 KHz
300 800 KHz
4V
200 mV
0.4
2.0
2
4.5
600
150
V
V
µA
V
us
℃
FR9810-Preliminary 0.1-FEB-2011
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet FR9810.PDF ] | |
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