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TC28C43EOE 데이터시트(PDF) 3 Page - TelCom Semiconductor, Inc

부품명 TC28C43EOE
상세설명  BiCMOS CURRENT MODE PWM CONTROLLERS
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제조업체  TELCOM [TelCom Semiconductor, Inc]
홈페이지  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC28C43EOE 데이터시트(HTML) 3 Page - TelCom Semiconductor, Inc

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4-95
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
Output Section
RDS (ON)
ISINK = 20mA
7
15
7
15
RDS (ON)
ISOURCE = 20mA
11
20
11
15
Rise Time
CL = 1nF (Note 1)
40
60
35
60
nsec
Fall Time
CL = 1nF (Note 1)
30
60
30
40
nsec
Cross Conduction
In Coulombs (Note 1)
6.5
6.5
nC
VDD Ma
Note 1
18
18
V
Undervoltage Lockout Section
Start Threshold
x8C43
7.9
8.4
8.8
7.9
8.4
8.8
V
Undervoltage Threshold
x8C43
7.2
7.6
7.9
7.2
7.6
7.9
V
PWM Section
Maximum Duty Cycle
x8C43 (Note 1)
95
97
100
95
97
100
%
Minimum Duty Cycle
0
0
%
Supply Current
Start Up
TA = 25°C, VIN < VUV; Figure 1
50
170
300
50
170
300
µA
Operating
VFB = V(ISENSE) = 0V; Figure 4
1
2
1
1.5
mA
ELECTRICAL CHARACTERISTICS (Cont): unless otherwise stated, these specifications apply over specified
temperature range. VIN = VDD = 15V; RT = 71 kΩ; CT = 150 pF.
TC18C4X
TC28C4X
TC38C4X
Parameter
Test Conditions
Min
Typ
Max
Min
Typ
Max
Units
where 0
≤ V(ISENSE) ≤ 0.8V
4. Output frequency equals oscillator frequency for the
x8C43.
5. PSRR of VREF, Error Amp and PWM Comparator
combination.
NOTES: 1. These parameters, although guaranteed over the
recommended operating conditions, are not tested in
production.
2. Parameter measured at trip point of latch.
3. Gain ratio is defined as:
∆VCOMP
∆V(ISENSE)
TelCom Semiconductor reserves the right to make changes in the circuitry or specifications detailed in this manual at any time without notice. Minimums
and maximums are guaranteed. All other specifications are intended as guidelines only. TelCom Semiconductor assumes no responsibility for the use of
any circuits described herein and makes no representations that they are free from patent infringement.
*Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses above
those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of
the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to Absolute
Maximum Rating Conditions for extended periods may affect device reliability.
PIN DESCRIPTION
Pin No.
Pin No
Pin No
8-Pin
14-Pin
16-Pin
Symbol
Description
2
1
NC
No Connection
4
2
NC
No Connection
1
1
3
CMPTR
Compensation of the feedback loop response.
234
VFB
Feedback of voltage to error amplifier to regulate voltage.
355
ISENSE
For sensing pass transistor current and terminate drive when current
limit threshold is reached at this pin.
4
7
6
RT/CT
Capacitor and resistor input to set oscillator frequency of this PWM
controller. The resistor is connected from VREF output to RT/CT.
The capacitor is connected from RT/CT to ANALOG GND.
TC18C43
TC28C43
TC38C43
BiCMOS CURRENT MODE
PWM CONTROLLERS


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