RT9645 Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Lista de partido
RT9645 Datasheet PDF : 13 Pages
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Preliminary
Par amete r
Oscillator and Soft-Start
PW M Frequency
Ramp Amplitude
Ramp Offset
Soft-Start Interval
Reference Voltage
Reference Voltage VREF
VDDQ PWM1 Controller
UGATE Source
UGATE Sink
LGATE Source
LGATE Sink
OC Current Source
Under Voltage Lockout
COMP1 Enable Threshold
PWM2 Controller
OC current source
Under Voltage Lockout
SS2/EN2 Source Current
Enable Threshold
UV Protection Enable Threshold
FSB_VTT Regulator
External Gate Driver
Gate Source Current
Gate Sink Current
Under Voltage Lockout
3VSB Regulator
Regulated Voltage
Source Current
OC Current
Under Voltage Lockout
Others
S3, S5 High Input Threshold
S3, S5 Low Input Threshold
Thermal Shutdown Limit
Symbol
Test Condition
fOSC
ΔVOSC
VOSC_OS
TSS
VREF
IUGATEsc
VBOOT −VPHASE = 12V;
VUGATE − VPHA SE = 6V
RUGATEsk
VBOOT −VPHASE =
VUGATE − VPHASE
12 V;
= 1V
ILGATEsc VPVIN = 12V; VLGATE = 6V
RLGATEsk VPVIN = 12V; VLGATE = 1V
IOC1
VIS NS = 0V
V UV1
VEN1
IOC2
VIS NS2 = 0V
V UV2
ISS2
VSS2/EN2 = 0V
V EN2
VPT_EN2 VDD = 5V
VOH3
ISC3
ISK3
VUV3
VPVIN = 12V
VVTT_DRV = 3V
VVTT DRV = 0.6V
V 3VSB
ISC4
IOC4
V UV4
V IL
V IH
TSHDN
RT9645
Min Typ Max Units
265 300 345 kHz
-- 1.2 --
V
-- 0.9 --
V
4
8
-- ms
0.784 0.8 0.816 V
0.5 1
--
A
--
4
8
Ω
0.5 1
--
A
--
3
5
Ω
34 40 46 μA
--
75 --
%
0.1 0.2 --
V
34 40 46 μA
--
75 --
%
--
5
-- μA
-- 0.5 --
V
-- 3.6 --
V
10.5 --
--
V
--
4
-- mA
15 22 -- mA
--
75 --
%
3.2 3.3 3.4 V
30 40 -- mA
40 80 -- mA
--
75 --
%
--
-- 0.75 V
2.2 --
--
V
-- 140 --
°C
DS9645-00 August 2007
www.richtek.com
7
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