MC34065-H, L
High Performance
Dual Channel Current
Mode Controllers
The MC34065–H,L series are high performance, fixed frequency, dual
current mode controllers. They are specifically designed for off–line and
dc–to–dc converter applications offering the designer a cost effective
solution with minimal external components. These integrated circuits 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. These devices are
available in dual–in–line and surface mount packages.
The MC34065–H has UVLO thresholds of 14 V (on) and 10 V (off), ideally
suited for off–line converters. The MC34065–L is tailored for lower voltage
applications having UVLO thresholds of 8.4 V (on) and 7.8 V (off).
•
Unique Oscillator for Precise Duty Cycle Limit and Frequency Control
MC33065-H, L
HIGH PERFORMANCE
DUAL CHANNEL CURRENT
MODE CONTROLLERS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 648
•
•
•
•
•
•
•
•
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
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
PIN CONNECTIONS
Sync Input
CT
RT
1
2
3
4
5
6
7
8
(Top View)
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
Representative Block Diagram
VCC
5.0V
Reference
R
R
1
Sync Input
RT
CT
3
Oscillator
2
+
–
Error
Amp 1
Latching
PWM 1
7
Drive Output 1
Vref
Undervoltage
Lockout
VCC
Undervoltage
Lockout
16
Voltage Feedback 1
Compensation 1
Current Sense 1
Drive Output 1
Gnd
Vref
15
ORDERING INFORMATION
Device
MC34065DW–H
MC34065DW–L
Drive Output 2
Voltage
Feedback 1
Compensation 1
4
5
Current Sense 1
6
Operating
Temperature Range
Package
SO–16L
Drive Output
2
Enable 14
Voltage
Feedback 2 13
Compensation 2
12
Gnd
8
Drive Gnd
+
–
Error
Amp 2
Latching
PWM 2
10
MC34065P–H
MC34065P–L
MC33065DW–H
TA = 0° to +70°C
Plastic DIP
SO–16L
11
9
Current Sense 2
MC33065DW–L
MC33065P–H
MC33065P–L
TA = –40° to +85°C
Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
3–465
MC34065–H, L MC33065–H, L
MAXIMUM RATINGS
Rating
Power Supply Voltage
Output Current, Source or Sink (Note 1)
Output Energy (Capacitive Load per Cycle)
Current Sense, Enable, and Voltage Feedback Inputs
Sync Input
High State (Voltage)
Low State (Reverse Current)
Error Amp Output Sink Current
Power Dissipation and Thermal Characteristics
DW Suffix, Plastic Package Case 751G
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
P Suffix, Plastic Package Case 648
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
Operating Junction Temperature
Operating Ambient Temperature (Note 3)
MC34065
MC33065
Storage Temperature Range
Symbol
VCC
IO
W
Vin
VIH
IIL
IO
Value
20
400
5.0
– 0.3 to +5.5
+5.5
– 5.0
10
Unit
V
mA
µJ
V
V
mA
mA
PD
R
θ
JA
PD
R
θ
JA
TJ
TA
862
145
mW
°C/W
1.25
100
+150
0 to +70
– 40 to +85
mW
°C/W
°C
°C
Tstg
– 65 to +150
°C
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 to [Note 3].)
Characteristics
REFERENCE SECTION
Reference Output Voltage (IO = 1.0 mA, TJ = 25°C)
Line Regulation (VCC = 11 V to 20 V)
Load Regulation (IO = 1.0 mA to 10 mA, VCC = 20 V)
Total Output Variation over Line, Load, and Temperature
Output Short Circuit Current
OSCILLATOR AND PWM SECTIONS
Total Frequency Variation over Line and Temperature
VCC = 11 V to 20 V, TA = Tlow to Thigh
MC34065
MC33065
Frequency Change with Voltage (VCC = 11 V to 20 V)
Duty Cycle at each Output
Maximum
Minimum
Sync Input Current
High State (Vin = 2.4 V)
Low State (Vin = 0.8 V)
ERROR AMPLIFIERS
Voltage Feedback Input (VO = 2.5 V)
Input Bias Current (VFB = 5.0 V)
Open Loop Voltage Gain (VO = 2.0 V to 4.0 V)
Unity Gain Bandwidth (TJ = 25°C)
Power Supply Rejection Ratio (VCC = 11 V to 20 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
2.45
–
65
0.7
60
0.45
2.0
5.0
–
2.5
– 0.1
100
1.0
90
1.0
12
6.2
0.8
2.55
– 1.0
–
–
–
–
–
V
–
1.1
V
µA
dB
MHz
dB
mA
fosc
46.5
45
∆f
osc/∆V
DCmax
DCmin
IIH
IIL
–
46
–
–
–
49
49
0.2
49.5
–
170
80
51.5
53
1.0
52
0
µA
250
160
%
%
kHz
Vref
Regline
Regload
Vref
ISC
4.85
–
–
4.8
30
5.0
2.0
3.0
–
100
5.13
20
25
5.15
–
V
mV
mV
V
mA
Symbol
Min
Typ
Max
Unit
3–466
MOTOROLA ANALOG IC DEVICE DATA
MC34065–H, L MC33065–H, L
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 to [Note 3].)
Characteristics
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)
DRIVE OUTPUT 2 ENABLE PIN
Enable Pin Voltage – High State (Output 2 Enabled)
Enable Pin Voltage
– Low State (Output 2 Disabled)
Low State Input Current (VIL = 0 V)
DRIVE OUTPUTS
Output Voltage – Low State (Isink = 20 mA)
Output Voltage – Low State
(Isink = 200 mA)
Output Voltage
– High State (Isource = 20 mA)
Output Voltage – High State
(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)
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold (VCC Increasing)
–L Suffix
–H Suffix
Minimum Operating Voltage After Turn–On (VCC Decreasing)
–L Suffix
–H Suffix
TOTAL DEVICE
Power Supply Current
Startup
–L Suffix (VCC = 6.0 V)
–H Suffix (VCC = 12 V)
Operating (Note 2)
ICC
–
–
–
0.4
0.6
20
0.8
1.0
25
mA
Vth
7.8
13
VCC(min)
7.2
9.0
7.8
10
8.4
11
8.4
14
9.0
15
V
V
VOL
VOH
VOL(UVLO)
tr
tf
–
1.6
12.8
10
–
–
–
0.3
2.4
13.3
11.2
0.1
50
50
0.5
3.0
–
12.3
1.1
150
150
V
VIH
VIL
IIB
3.5
0
100
–
–
250
Vref
1.5
400
V
µA
AV
Vth
IIB
tPLN(In/Out)
2.75
0.9
–
–
3.0
1.0
– 2.0
150
3.25
1.1
– 10
300
V/V
V
µA
ns
Symbol
Min
Typ
Max
Unit
V
ns
ns
NOTES:
1. Maximum package power dissipation limits must be observed.
4. This parameter is measured at the latch trip point with VFB = 0 V
NOTES:
2. Adjust VCC above the startup threshold before setting to 15 V.
∆V
Compensation
NOTES:
3. Low duty cycle pulse techniques are used during test to maintain junction
5. Comparator gain is defined as AV =
∆V
Current Sense
NOTES:
3.
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
Figure 1. Timing Resistor versus
Oscillator Frequency
16
R T, TIMING RESISTOR (k
Ω
)
14
12
10
5.0 nF
3.3 nF
1.0 nF
100 pF
500 pF
220 pF
Figure 2. Maximum Output Duty Cycle
versus Oscillator Frequency
50
DCmax , DUTY CYCLE MAXIMUM (%)
48
46
44
42
40
38
VCC = 15 V
RT = 4.0 k to 16 k
TA = 25°
CL = 15 pF
10 k
30 k 50 k
100 k
300 k 500 k
fOSC, OSCILLATOR FREQUENCY (Hz)
1.0 M
Output 1
Output 2
330 pF
2.2 nF
8.0
6.0
4.0
CT =
10 nF
VCC = 15 V
TA = 25°C
10 k
30 k 50 k
100 k
300 k 500 k
fOSC, OSCILLATOR FREQUENCY (Hz)
1.0 M
MOTOROLA ANALOG IC DEVICE DATA
3–467
MC34065–H, L MC33065–H, L
Figure 3. Error Amp Small–Signal
Transient Response
VCC = 15 V
AV = –1.0
TA = 25°C
20 mV/DIV
Figure 4. Error Amp Large–Signal
Transient Response
VCC = 15 V
AV = –1.0
TA = 25°C
200 mV/DIV
1.0
µs/DIV
2.55 V
3.0 V
2.50 V
2.50 V
2.45 V
1.0
µs/DIV
2.0 V
Figure 5. Error Amp Open Loop Gain and
Phase versus Frequency
Vth , CURRENT SENSE INPUT THRESHOLD (V)
A VOL, OPEN LOOP VOLTAGE GAIN (dB)
100
80
60
40
20
0
–20
10
Gain
VCC = 15 V
VO = 1.5 V to 2.5 V
RL = 100 k
TA = 25°C
0
φ
, EXCESS PHASE (DEGREES)
30
60
90
Phase 120
150
180
10 M
1.2
1.0
0.8
0.6
0.4
0.2
0
0
Figure 6. Current Sense Input Threshold
versus Error Amp Output Voltage
VCC = 15 V
TA = 125°C
TA = 25°C
TA = –55°C
100
1.0 k
10 k
100 k
1.0 M
1.0
2.0
3.0
4.0
5.0
6.0
7.0
f, FREQUENCY (Hz)
VO, ERROR AMP OUTPUT VOLTAGE (V)
0
VCC = 15 V
ISC , REFERENCE SHORT CIRCUIT CURRENT (mA)
∆V
ref, REFERENCE VOLTAGE CHANGE (mV)
Figure 7. Reference Voltage Change
versus Source Current
Figure 8. Reference Short Circuit Current
versus Temperature
120
VCC = 15 V
RL
≤
0.1
Ω
100
–4.0
–8.0
–12
TA = 25°C
TA = 125°C
TA = –55°C
–16
–20
–24
0
20
40
60
80
80
100
120
60
–55
–25
Iref, REFERENCE SOURCE CURRENT (mA)
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
125
3–468
MOTOROLA ANALOG IC DEVICE DATA
MC34065–H, L MC33065–H, L
Figure 9. Reference Load Regulation
∆V
O, OUTPUT VOLTAGE CHANGE (2.0 mV/DIV)
VCC = 15 V
IO = 1.0 mA to 10 mA
TA = 25°C
∆V
O, OUTPUT VOLTAGE CHANGE (2.0 mV/DIV)
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
Vsat , OUTPUT SATURATION VOLTAGE (V)
0
VCC
Source Saturation
VCC = 15 V
(Load to Ground) 80
µs
Pulsed Load
120 Hz Rate
TA = 25°C
TA = –55°C
Figure 12. Output Waveform
VCC = 15 V
CL = 1.0 nF
TA = 25°C
–2.0
–4.0
–6.0
4.0
2.0
0
0
90% –
TA = –55°C
TA = 25°C
Gnd
Sink Saturation
(Load to VCC)
400
10% –
100
200
300
IO, OUTPUT LOAD CURRENT (mA)
100 ns/DIV
VO2, OUTPUT VOLTAGE 2; VO1, OUTPUT VOLTAGE 1
ICC, SUPPLY CURRENT
Figure 13. Output Cross Conduction Current
32
10 V/DIV 50 mA/DIV 10 V/DIV
ICC , SUPPLY CURRENT (mA)
Figure 14. Supply Current versus Supply Voltage
RT = 10 k
CT = 3.3 nF
VFB = 0 V
Current Sense = 0 V
TA = 25°C
–L Suffix
–H Suffix
8.0
24
VCC = 15 V
CL = 15 pF
TA = 25°C
16
100 ns/DIV
0
0
4.0
8.0
12
16
20
VCC, SUPPLY VOLTAGE (V)
MOTOROLA ANALOG IC DEVICE DATA
3–469
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