RT9245C 查看數據表（PDF） - Richtek Technology
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RT9245C Datasheet PDF : 25 Pages
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RT9245C
Absolute Maximum Ratings (Note 1)
z Supply Voltage, VCC ------------------------------------------------------------------------------------------- 7V
z Input, Output or I/O Voltage ---------------------------------------------------------------------------------- GND − 0.3V to VCC + 0.3V
z Power Dissipation, PD @ TA = 25°C
TSSOP-28 -------------------------------------------------------------------------------------------------------- 1W
z Package Thermal Resistance (Note 4)
TSSOP-28, θJA -------------------------------------------------------------------------------------------------- 100°C/W
z Junction Temperature ------------------------------------------------------------------------------------------ 150°C
z Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------- 260°C
z Storage Temperature Range --------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 2)
HBM (Human Body Mode) ----------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
z Supply Voltage, VCC ------------------------------------------------------------------------------------------- 5V ± 10%
z Junction Temperature Range --------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range --------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VCC = 5V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
VCC Supply Current
Nominal Supply Current
ICC
Power-On Reset
POR Threshold
Hysteresis
VDVD Threshold
Oscillator
Trip (Low to High)
Hysteresis
VCCRTH
VCCHYS
VDVDTP
VDVDHYS
Free Running Frequency
Frequency Adjustable Range
Ramp Amplitude
Ramp Valley
Maximum Duty of Each Channel
fOSC
fOSC_ADJ
ΔVOSC
VRV
RT Pin Voltage
VRT
Reference and DAC
DACOUT Voltage Accuracy
ΔVDAC
Test Conditions
PWM 1,2,3,4 Open
VCC Rising
Enable
RRT = 20kΩ
RRT = 20kΩ
RRT = 20kΩ
VDAC ≥ 1V
VDAC < 1V
Min Typ Max Units
--
12 16 mA
4.0 4.2 4.5 V
0.2 0.5 --
V
0.94 1.0 1.06 V
--
50
-- mV
170 200 230 kHz
50
-- 400 kHz
--
1.9
--
V
0.7 1.0 --
V
58
64
70
%
0.9 1.0 1.1 V
−0.5 -- +0.5 %
−5
--
+5 mV
To be continued
DS9245C-02 March 2007
www.richtek.com
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