UCC3817D UNITRODE, UCC3817D Datasheet - Page 5

• Manufacturer Part Number: UCC3817D
• Description: POWER FACTOR CNTRLR, 3817, SOIC16
• Manufacturer: UNITRODE

Specifications of UCC3817D

• Primary Input Voltage: 15V
• No. Of Outputs: 1
• Output Voltage: 5.5V
• Voltage Regulator Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: 0°C To +70°C
• Operating Temperature Max: 70°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

electrical characteristics
= T
feed-forward section
soft start section
gate driver section
zero power section
pin descriptions
VFF output current
SS charge current
Pullup resistance
Pulldown resistance
Output rise time
Output fall time
Maximum duty cycle
Minimum controlled duty cycle
Zero power comparator threshold
J,
CAI: (current amplifier noninverting input) Place a resistor between this pin and the GND side of current sense
resistor. This input and the inverting input (MOUT) remain functional down to and below GND.
CAOUT: (current amplifier output) This is the output of a wide bandwidth operational amplifier that senses line
current and commands the PFC pulse-width modulator (PWM) to force the correct duty cycle. Compensation
components are placed between CAOUT and MOUT.
CT: (oscillator timing capacitor) A capacitor from CT to GND sets the PWM oscillator frequency according to:
The lead from the oscillator timing capacitor to GND should be as short and direct as possible.
DRVOUT: (gate drive) The output drive for the boost switch is a totem-pole MOSFET gate driver on DRVOUT.
Use a series gate resistor to prevent interaction between the gate impedance and the output driver that might
cause the DRVOUT to overshoot excessively. See characteristic curve (Figure 13) to determine minimum
required gate resister value. Some overshoot of the DRVOUT output is always expected when driving a
capacitive load.
GND: (ground) All voltages measured with respect to ground. VCC and REF should be bypassed directly to
GND with a 0.1-µF or larger ceramic capacitor.
VCC = 12 V, R
f [
PARAMETER
PARAMETER
PARAMETER
PARAMETER
RT
0.6
CT
T
= 22 kΩ, C
, T
A
T
= 0°C to 70°C for the UCC3817 and T
I AC = 300 µA
I O = –100 mA to −200 mA
I O = 100 mA
C L = 1 nF,
C L = 1 nF,
At 100 kHz
Measured on VAOUT
= 270 pF, (unless otherwise noted)
R L = 10 Ω,
R L = 10 Ω,
TEST CONDITIONS
TEST CONDITIONS
TEST CONDITIONS
TEST CONDITIONS
www.ti.com
V DRVOUT = 0.7 V to 9.0 V
V DRVOUT = 9.0 V to 0.7 V
A
SLUS395J - FEBRUARY 2000 - REVISED MARCH 2009
= −40°C to 85°C for the UCC2817, T
−140
0.20
MIN
MIN
MIN
MIN
−6
93
−150
TYP
TYP
TYP
TYP
0.33
−10
25
10
95
5
2
MAX
−160
MAX
MAX
MAX
0.50
−16
12
10
50
50
99
2
UNITS
UNITS
UNITS
UNITS
µA
µA
ns
ns
Ω
Ω
%
%
V
A
5