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MC34065のメーカーはMotorola Semiconductorsです、この部品の機能は「High Performance Dual Channel Current Mode Controllers」です。 |
部品番号 | MC34065 |
| |
部品説明 | High Performance Dual Channel Current Mode Controllers | ||
メーカ | Motorola Semiconductors | ||
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 30 pages
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
MC34065
MC33065
HIGH PERFORMANCE
DUAL CHANNEL CURRENT
MODE CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 648
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
16
1
Vref 15
1
Sync Input
3
RT
CT
2
Voltage
Feedback 1 4
Compensation 1
5
Drive Output 2
Enable 14
Voltage
Feedback 2 13
Compensation 2
12
Representative Block Diagram
5.0 V
R Reference
R Vref
Undervoltage
Lockout
Oscillator
+
–
Error
Amp 1
VCC 16
VCC
Undervoltage
Lockout
Latching
PWM 1
Drive
7 Output 1
Current
6 Sense 1
+
–
Error
Amp 2
Latching
PWM 2
Gnd 8
Drive Gnd 9
This device contains 208 active transistors.
Drive
10 Output 2
Current
11 Sense 2
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
Operating
Temperature Range Package
MC34065DW
MC34065P
SO–16L
TA = 0° to +70°C Plastic DIP
MC33065DW
MC33065P
SO–16L
TA = –40° to +85°C Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
3–451
1 Page MC34065 MC33065
ELECTRICAL CHARACTERISTICS (continued) (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 3].)
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)
VFB
IIB
AVOL
BW
PSRR
2.42 2.5
– – 0.1
65 100
0.7 1.0
60 90
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)
Isource
Isink
VOH
VOL
–0.45
2.0
5.0
–
–1.0
12
6.2
0.8
CURRENT SENSE SECTION
Current Sense Input Voltage Gain (Notes 4 and 5)
Maximum Current Sense Input Threshold (Note 4)
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
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 –
VIL 0 –
IIB 100 250
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
VOH
VOL(UVLO)
tr
tf
–
–
13
12
–
–
–
0.1
1.6
13.5
13.4
0.1
28
25
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold
Minimum Operating Voltage After Turn–On
Vth
VCC(min)
13
9.0
14
10
TOTAL DEVICE
Power Supply Current
Startup (VCC = 12 V)
Operating (Note 2)
ICC
– 0.6
– 20
Power Supply Zener Voltage (ICC = 30 mA)
VZ 15.5 17
NOTES: 1. Maximum package power dissipation limits must be observed.
2. Adjust VCC above the startup threshold before setting to 15 V.
3. 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
4. This parameter is measured at the latch trip point with VFB = 0 V
+5. Comparator gain is defined as AV
DV Compensation
DV Current Sense
2.58
–1.0
–
–
–
–
–
–
1.1
3.25
530
–10
300
Vref
1.5
400
0.4
2.5
–
–
1.1
150
150
15
11
1.0
25
19
V
µA
dB
MHz
dB
mA
V
V/V
mV
µA
ns
V
µA
V
V
ns
ns
V
V
mA
V
MOTOROLA ANALOG IC DEVICE DATA
3–453
3Pages MC34065 MC33065
Figure 9. Reference Load Regulation
VCC = 15 V
IO = 1.0 mA to 10 mA
TA = 25°C
Figure 10. Reference Line Regulation
VCC = 11 V to 15 V
TA = 25°C
1.0 ms/DIV
1.0 ms/DIV
Figure 11. Output Saturation Voltage
versus Load Current
0
–1.0
VCC
Source Saturation VCC = 15 V
(Load to Ground) 80 µs Pulsed Load
TA = 25°C 120 Hz Rate
–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)
90% –
10% –
Figure 12. Output Waveform
VCC = 15 V
CL = 1.0 nF
TA = 25°C
50 ns/DIV
Figure 13. Output Cross Conduction Current
VCC = 15 V
CL = 15 pF
TA = 25°C
100 ns/DIV
Figure 14. Supply Current versus Supply Voltage
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)
3–456
MOTOROLA ANALOG IC DEVICE DATA
6 Page | |||
ページ | 合計 : 30 ページ | ||
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