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參數(shù)資料
| 型號： | TC170COERT |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 85K |
| 代理商： | TC170COERT |
3
CMOS CURRENT MODE
PWM CONTROLLER
TC170
TC170-5 10/7/99
2001 Microchip Technology Inc.
DS21395A
Pin No.
Symbol
Description
(16-Pin Plastic DIP)
Package
1
SOFT START/ILIM
Soft Start Adjust / Current Limit. For setting the peak current threshold of sense inputs
(pins 3 and 4). Second function of this pin is Soft-Start Adjust.
2VREF OUT
Reference supply output of 5.1 volts. It can supply a minimum of 10mA.
3– ISENSE IN
– Current Sense Input. Inverting input for sensing peak current of the pass transistor
through series sense current monitor resistor.
4+ ISENSE IN
+ Current Sense Input. Non-inverting input used in conjunction with pin 3. This senses
the positive end of current monitor resistor.
5
+ ERROR AMP IN
+ Error Amp In. Non-inverting input for output voltage regulation.
6
– ERROR AMP IN
– Error Amp In. Inverting input of the amplifier for the reference voltage.
7
CMPTR
For compensation of the feedback loop response.
8CO
Timing capacitor (CO) input to set oscillator frequency in conjunction with pin 9, RO,
resistor input. Second function is for setting crossover dead time of pin 11and 14 outputs.
9RO
Timing resistor (RO) input to set oscillator frequency by setting constant current charge
rate to charge capacitor CO.
10
SYNC
For PWM controller oscillator synchronization of two or more controllers. Or as a clock
input to sync oscillator from external signal.
11
OUTPUT A
A output drive of phase A from push pull transistors.
12
GND
Ground return for all input and output pins.
13
VDD
Supplies power to operate the output drivers only.
14
OUTPUT B
Output of phase B from push pull transistors.
15
VIN
Voltage bias supply for all TC170 circuits except the output transistors.
16
SHDN
Input pin to disable both output drives to 0V OFF.
PIN CONFIGURATIONS (DIP and SOIC)
TC170
CPE
SHDN
VDD
SOFT START/
ILIM
OUTPUT B
VREF
– I SENSE IN
+ I SENSE IN
+ ERROR AMP IN
CMPTR
GND
OUTPUT A
SYNC
RO
OUT
– ERROR AMP IN
NOTE: Outputs LOW in "OFF" state.
VIN
SHDN
VDD
OUTPUT B
GND
OUTPUT A
SYNC
RO
VIN
CO
SOFT START/
ILIM
VREF
– I SENSE IN
+ I SENSE IN
+ ERROR AMP IN
CMPTR
OUT
– ERROR AMP IN
CO
1
2
3
4
16
15
14
13
5
6
7
12
11
10
9
8
1
2
3
4
15
16
14
13
5
6
7
12
11
10
9
8
TC170COE
ELECTRICAL CHARACTERISTICS: VIN = 16V, RO = 24k, CO = 1nF, TA = 25°C, unless otherwise indicated.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
Output Stage (Cont.)
VOL
Output High Level
ISOURCE = 100mA
VDD – 4V
V
tR
Output Rise Time
CL = 1000pF
50
150
nsec
tF
Output Fall Time
CL = 1000pF
50
150
nsec
Undervoltage Lockout
Start-Up
Threshold
7.15
7.7
8.25
V
Threshold Hysteresis
0.5
0.75
1
V
Supply
IS Standby Supply Current
2.7
3.8
mA
PIN DESCRIPTION
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