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MC34065のメーカーはON Semiconductorです、この部品の機能は「High Performance Dual Channel Current Mode Controller」です。 |
部品番号 | MC34065 |
| |
部品説明 | High Performance Dual Channel Current Mode Controller | ||
メーカ | ON Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとMC34065ダウンロード(pdfファイル)リンクがあります。 Total 18 pages
MC34065, MC33065
High Performance
Dual Channel Current
Mode Controller
The MC34065 is a high performance, fixed frequency, dual current
mode controllers. It is specifically designed for off−line and dc−to−dc
converter applications offering the designer a cost effective solution
with minimal external components. This integrated circuit feature a
unique oscillator for precise duty cycle limit and frequency control, a
temperature compensated reference, two high gain error amplifiers,
two current sensing comparators, Drive Output 2 Enable pin, and two
high current totem pole outputs ideally suited for driving power
MOSFETs.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle−by−cycle
current limiting, and a latch for single pulse metering of each output.
The MC34065 and MC33065 are available in dual−in−line and
surface mount packages.
• Unique Oscillator for Precise Duty Cycle Limit and Frequency
Control
• Current Mode Operation to 500 kHz
• Automatic Feed Forward Compensation
• Separate Latching PWMs for Cycle−By−Cycle Current Limiting
• Internally Trimmed Reference with Undervoltage Lockout
• Drive Output 2 Enable Pin
• Two High Current Totem Pole Outputs
• Input Undervoltage Lockout with Hysteresis
• Low Startup and Operating Current
VCC 16
Vref
15
R
5.0 V
Reference
VCC
Undervoltage
Lockout
1
Sync Input
3
RT
CT
2
Voltage
Feedback 1 4
Compensation 1
5
R Vref
Undervoltage
Lockout
Oscillator
+
−
Error
Amp 1
Latching
PWM 1
Drive
7 Output 1
Current
6 Sense 1
Drive Output 2
Enable 14
Voltage
Feedback 2 13
Compensation 2
12
+
−
Error
Amp 2
Gnd 8
Latching
PWM 2
Drive Gnd 9
Drive
10 Output 2
Current
1 Sense 2
1
This device contains 208 active transistors.
Figure 1. Representative Block Diagram
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 3
1
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16
1
16
1
PDIP−16
P SUFFIX
CASE 648
SO−16W
DW SUFFIX
CASE 751G
PIN CONNECTIONS
Sync Input 1
CT 2
RT 3
Voltage Feedback 1 4
Compensation 1 5
Current Sense 1 6
Drive Output 1 7
Gnd 8
16 VCC
15 Vref
14
Drive Output 2
Enable
13 Voltage Feedback 2
12 Compensation 2
11 Current Sense 2
10 Drive Output 2
9 Drive Gnd
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
MC34065DW−L
SO−16W 47 Units/Rail
MC34065P−L
PDIP−16 25 Units/Rail
MC33065DW−L
SO−16W 47 Units/Rail
MC33065DW−H SO−16W 47 Units/Rail
MC33065DW−HR2 SO−16W 1000 Tape & Reel
MC33065P−H
PDIP−16 25 Units/Rail
MC33065P−L
PDIP−16 25 Units/Rail
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 16 of this data sheet.
Publication Order Number:
MC34065/D
1 Page MC34065, MC33065
ELECTRICAL CHARACTERISTICS (VCC = 15 V [Note 2], RT = 8.2 kΩ, CT = 3.3 nF, for typical values TA = 25°C, for min/max
values TA is the operating ambient temperature range that applies [Note 6].)
Characteristics
Symbol
Min Typ Max Unit
ERROR AMPLIFIERS
Voltage Feedback Input (VO = 2.5 V)
Input Bias Current (VFB = 5.0 V)
Open Loop Voltage Gain (VO = 2.0 to 4.0 V)
Unity Gain Bandwidth (TJ = 25°C)
Power Supply Rejection Ratio (VCC = 11 V to 15 V)
Output Current
Source (VO = 3.0 V, VFB = 2.3 V)
Sink (VO = 1.2 V, VFB = 2.7 V)
Output Voltage Swing
High State (RL = 15 k to ground, VFB = 2.3 V)
Low State (RL = 15 k to Vref, VFB = 2.7 V)
VFB
IIB
AVOL
BW
PSRR
Isource
Isink
VOH
VOL
2.42 2.5
− − 0.1
65 100
0.7 1.0
60 90
−0.45
2.0
−1.0
12
5.0 6.2
− 0.8
2.58
−1.0
−
−
−
−
−
−
1.1
CURRENT SENSE SECTION
Current Sense Input Voltage Gain (Notes 7 and 8)
Maximum Current Sense Input Threshold (Note 7)
Input Bias Current
Propagation Delay (Current Sense Input to Output)
AV
Vth
IIB
tPLN(In/Out)
2.75
430
−
−
3.0
480
−2.0
150
3.25
530
−10
300
DRIVE OUTPUT 2 ENABLE PIN
Enable Pin Voltage
High State (Output 2 Enabled)
Low State (Output 2 Disabled)
Low State Input Current (VIL = 0 V)
VIH 3.5 − Vref
VIL 0 − 1.5
IIB 100 250 400
DRIVE OUTPUTS
Output Voltage
Low State (Isink = 20 mA)
(Isink = 200 mA)
High State (Isource = 20 mA)
(Isource = 200 mA)
Output Voltage with UVLO Activated (VCC = 6.0 V, Isink = 1.0 mA)
Output Voltage Rise Time (CL = 1.0 nF)
Output Voltage Fall Time (CL = 1.0 nF)
VOL − 0.1 0.4
− 1.6 2.5
VOH
13 13.5
−
12 13.4
−
VOL(UVLO)
−
0.1 1.1
tr − 28 150
tf − 25 150
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold
Minimum Operating Voltage After Turn−On
Vth 13 14 15
VCC(min)
9.0
10
11
TOTAL DEVICE
Power Supply Current
Startup (VCC = 12 V)
Operating (Note 5)
ICC
− 0.6 1.0
− 20 25
Power Supply Zener Voltage (ICC = 30 mA)
VZ
15.5 17
19
5. Adjust VCC above the startup threshold before setting to 15 V.
6. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible:
Tlow = 0°C for the MC34065
Thigh = +70°C for MC34065
Tlow = −40°C for the MC33065
Thigh = +85°C for MC33065
7. This parameter is measured at the latch trip point with VFB = 0 V.
8.
Comparator
gain
is
defined
as
AV
+
DVCompensation
DVCurrent Sense
.
V
μA
dB
MHz
dB
mA
V
V/V
mV
μA
ns
V
μA
V
V
ns
ns
V
V
mA
V
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3
3Pages MC34065, MC33065
VCC = 15 V
IO = 1.0 mA to 10 mA
TA = 25°C
VCC = 11 V to 15 V
TA = 25°C
1.0 ms/DIV
Figure 10. Reference Load Regulation
1.0 ms/DIV
Figure 11. Reference Line Regulation
0
−1.0
VCC
Source Saturation VCC = 15 V
(Load to Ground) 80 μs Pulsed Load
TA = 25°C 120 Hz Rate
90% −
−2.0
TA = −55°C
2.0 TA = −55°C
1.0
TA = 25°C
Gnd Sink Saturation
(Load to VCC)
0
0 200 400 600 800
IO, OUTPUT LOAD CURRENT (mA)
Figure 12. Output Saturation Voltage
versus Load Current
10% −
VCC = 15 V
CL = 1.0 nF
TA = 25°C
50 ns/DIV
Figure 13. Output Waveform
VCC = 15 V
CL = 15 pF
TA = 25°C
100 ns/DIV
Figure 14. Output Cross Conduction Current
32
RT = 8.2 k
CT = 3.3 nF
24
VFB1,2 = 0 V
Current Sense 1,2 = 0 V
TA = 25°C
16
8.0
0
0 4.0 8.0 12 16 20
VCC, SUPPLY VOLTAGE (V)
Figure 15. Supply Current versus Supply Voltage
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ページ | 合計 : 18 ページ | ||
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PDF ダウンロード | [ MC34065 データシート.PDF ] |
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