Motorola MC34065P-L, MC34065DW-H, MC34065DW-L, MC33065P-L, MC33065DW-H Datasheet

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

•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

		Representative Block Diagram
						VCC	16
Vref					5.0V	VCC
	15				Reference	Undervoltage
		R				Lockout
		R		Vref
	1		Undervoltage
			Lockout
Sync Input
	3
RT
			Oscillator				Drive Output 1
CT
	2					Latching	7
						PWM 1
Voltage		+
		±
Feedback 1	4
		Error					Current Sense 1
Compensation 1		Amp 1
	5						6
Drive Output							Drive Output 2
2	14					Latching	10
Enable
						PWM 2
Voltage		+
		±
Feedback 2 13
		Error					Current Sense 2
		Amp 2
Compensation 2							11
	12
			Gnd	8	Drive Gnd	9

Order this document by MC34065±H/D

MC34065-H, L MC33065-H, L

HIGH PERFORMANCE DUAL CHANNEL CURRENT MODE CONTROLLERS

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

CASE 648

DW SUFFIX

PLASTIC PACKAGE

CASE 751G

(SO±16L)

PIN CONNECTIONS

Sync Input	1			16	VCC
CT	2	15			Vref
RT	3		14		Drive Output 2 Enable
Voltage Feedback 1	4	13			Voltage Feedback 2
Compensation 1	5	12			Compensation 2
Current Sense 1	6	11			Current Sense 2
Drive Output 1	7	10			Drive Output 2
Gnd	8	9			Drive Gnd
		(Top View)

ORDERING INFORMATION

		Operating
	Device	Temperature Range	Package
	MC34065DW±H		SO±16L
	MC34065DW±L	TA = 0° to +70°C
	MC34065P±H		Plastic DIP
	MC34065P±L
	MC33065DW±H		SO±16L
	MC33065DW±L	TA = ±40° to +85°C
	MC33065P±H		Plastic DIP
	MC33065P±L

Motorola, Inc. 1996

Rev 0

MC34065±H, L MC33065±H, L

MAXIMUM RATINGS

Rating	Symbol	Value	Unit
Power Supply Voltage	VCC	20	V
Output Current, Source or Sink (Note 1)	IO	400	mA
Output Energy (Capacitive Load per Cycle)	W	5.0	μJ
Current Sense, Enable, and Voltage Feedback Inputs	Vin	± 0.3 to +5.5	V
Sync Input
High State (Voltage)	VIH	+5.5	V
Low State (Reverse Current)	IIL	± 5.0	mA
Error Amp Output Sink Current	IO	10	mA
Power Dissipation and Thermal Characteristics
DW Suffix, Plastic Package Case 751G
Maximum Power Dissipation @ TA = 25°C	PD	862	mW
Thermal Resistance, Junction±to±Air	RθJA	145	°C/W
P Suffix, Plastic Package Case 648
Maximum Power Dissipation @ TA = 25°C	PD	1.25	mW
Thermal Resistance, Junction±to±Air	RθJA	100	°C/W
Operating Junction Temperature	TJ	+150	°C
Operating Ambient Temperature (Note 3)	TA		°C
MC34065		0 to +70
MC33065		± 40 to +85
Storage Temperature Range	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	Symbol	Min	Typ	Max	Unit
REFERENCE SECTION
Reference Output Voltage (IO = 1.0 mA, TJ = 25°C)	Vref	4.85	5.0	5.13	V
Line Regulation (VCC = 11 V to 20 V)	Regline	±	2.0	20	mV
Load Regulation (IO = 1.0 mA to 10 mA, VCC = 20 V)	Regload	±	3.0	25	mV
Total Output Variation over Line, Load, and Temperature	Vref	4.8	±	5.15	V
Output Short Circuit Current	ISC	30	100	±	mA
OSCILLATOR AND PWM SECTIONS
Total Frequency Variation over Line and Temperature	fosc				kHz
VCC = 11 V to 20 V, TA = Tlow to Thigh
MC34065		46.5	49	51.5
MC33065		45	49	53
Frequency Change with Voltage (VCC = 11 V to 20 V)	fosc/ V	±	0.2	1.0	%
Duty Cycle at each Output					%
Maximum	DCmax	46	49.5	52
Minimum	DCmin	±	±	0
Sync Input Current					μA
High State (Vin = 2.4 V)	IIH	±	170	250
Low State (Vin = 0.8 V)	IIL	±	80	160
ERROR AMPLIFIERS
Voltage Feedback Input (VO = 2.5 V)	VFB	2.45	2.5	2.55	V
Input Bias Current (VFB = 5.0 V)	IIB	±	± 0.1	± 1.0	μA
Open Loop Voltage Gain (VO = 2.0 V to 4.0 V)	AVOL	65	100	±	dB
Unity Gain Bandwidth (TJ = 25°C)	BW	0.7	1.0	±	MHz
Power Supply Rejection Ratio (VCC = 11 V to 20 V)	PSRR	60	90	±	dB
Output Current					mA
Source (VO = 3.0 V, VFB = 2.3 V)	Isource	0.45	1.0	±
Sink (VO = 1.2 V, VFB = 2.7 V)	Isink	2.0	12	±
Output Voltage Swing					V
High State (RL = 15 k to ground, VFB = 2.3 V)	VOH	5.0	6.2	±
Low State (RL = 15 k to Vref, VFB = 2.7 V)	VOL	±	0.8	1.1

2	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	Symbol	Min	Typ	Max	Unit
CURRENT SENSE SECTION
Current Sense Input Voltage Gain (Notes 4 and 5)	AV	2.75	3.0	3.25	V/V
Maximum Current Sense Input Threshold (Note 4)	Vth	0.9	1.0	1.1	V
Input Bias Current	IIB	±	± 2.0	± 10	μA
Propagation Delay (Current Sense Input to Output)	tPLN(In/Out)	±	150	300	ns
DRIVE OUTPUT 2 ENABLE PIN
Enable Pin Voltage ± High State (Output 2 Enabled)	VIH	3.5	±	Vref	V
± Low State (Output 2 Disabled)	VIL	0	±	1.5
Low State Input Current (VIL = 0 V)	IIB	100	250	400	μA
DRIVE OUTPUTS
Output Voltage ± Low State (Isink = 20 mA)	VOL	±	0.3	0.5	V
(Isink = 200 mA)		1.6	2.4	3.0
± High State (Isource = 20 mA)	VOH	12.8	13.3	±
(Isource = 200 mA)		10	11.2	12.3
Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 1.0 mA)	VOL(UVLO)	±	0.1	1.1	V
Output Voltage Rise Time (CL = 1.0 nF)	tr	±	50	150	ns
Output Voltage Fall Time (CL = 1.0 nF)	tf	±	50	150	ns
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold (VCC Increasing)	Vth				V
±L Suffix		7.8	8.4	9.0
±H Suffix		13	14	15
Minimum Operating Voltage After Turn±On (VCC Decreasing)	VCC(min)				V
±L Suffix		7.2	7.8	8.4
±H Suffix		9.0	10	11
TOTAL DEVICE
Power Supply Current	ICC				mA
Startup
±L Suffix (VCC = 6.0 V)		±	0.4	0.8
±H Suffix (VCC = 12 V)		±	0.6	1.0
Operating (Note 2)		±	20	25

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 V Compensation

5. Comparator gain is defined as AV =

V Current Sense

Figure 1. Timing Resistor versus

Oscillator Frequency

	16
		3.3 nF			500 pF		100 pF
)	14
Ω
(k					1.0 nF		220 pF
RESISTOR	12
	10		5.0 nF				330 pF
,TIMING
	8.0				2.2 nF
		C	=
T		T
R	6.0	10 nF
		VCC = 15 V
	4.0	TA = 25°C
		10 k	30 k	50 k	100 k	300 k	500 k	1.0 M

fOSC, OSCILLATOR FREQUENCY (Hz)

Figure 2. Maximum Output Duty Cycle

versus Oscillator Frequency

	50
(%)	48
MAXIMUM
	46						Output 2
CYCLE	44					Output 1
, DUTY	42	VCC = 15 V
		RT = 4.0 k to 16 k
max	40	TA = 25°
		CL = 15 pF
DC
	38	10 k	30 k	50 k	100 k	300 k	500 k	1.0 M

fOSC, OSCILLATOR FREQUENCY (Hz)

MOTOROLA ANALOG IC DEVICE DATA	3

MC34065±H, L MC33065±H, L

2.55 V

2.50 V

2.45 V

Figure 3. Error Amp Small±Signal

Transient Response

VCC = 15 V

AV = ±1.0

TA = 25°C

20 mV/DIV

1.0 μs/DIV

3.0 V

2.50 V

2.0 V

Figure 4. Error Amp Large±Signal

Transient Response

VCC = 15 V

AV = ±1.0

TA = 25°C

200 mV/DIV

1.0 μs/DIV

Figure 5. Error Amp Open Loop Gain and

Phase versus Frequency

OPEN LOOP VOLTAGE GAIN (dB)	100							0
					VCC = 15 V				, EXCESS PHASE (DEGREES)
	80		Gain		VO = 1.5 V to 2.5 V			30
					RL = 100 k
	60				TA = 25°C			60
	40							90
	20						Phase	120
	0							150
,
VOL									φ
A	±20							180
	10	100	1.0 k	10 k	100 k	1.0 M	10 M

f, FREQUENCY (Hz)

			Figure 7. Reference Voltage Change
(mV)				versus Source Current
		0
CHANGE
							VCC = 15 V
VOLTAGE	±4.0
	±8.0
REFERENCE,		±12					TA = ±55°C
		±16				TA = 25°C
					TA = 125°C
ref		±20
V
		±24	20	40	60	80	100	120
		0

Iref, REFERENCE SOURCE CURRENT (mA)

Figure 6. Current Sense Input Threshold versus Error Amp Output Voltage

(V)	1.2
THRESHOLD
	1.0	VCC = 15 V
	0.8		TA = 125°C
INPUT
	0.6		TA = 25°C
SENSE
	0.4			TA = ±55°C
, CURRENT
	0.2
th	0
V		1.0	2.0	3.0	4.0	5.0	6.0	7.0
	0
			VO, ERROR AMP OUTPUT VOLTAGE (V)

	(mA)		Figure 8. Reference Short Circuit Current
				versus Temperature
	CURRENT	120
								VCC = 15 V
								RL ≤ 0.1	Ω
	SHORT CIRCUIT
		100
	, REFERENCE	80
		60
	SC
		±55	±25	0	25	50	75	100	125
	I
				TA, AMBIENT TEMPERATURE (°C)

4	MOTOROLA ANALOG IC DEVICE DATA

MC34065±H, L MC33065±H, L

VO, OUTPUT VOLTAGE CHANGE (2.0 mV/DIV)

Figure 9. Reference Load Regulation

VCC = 15 V

IO = 1.0 mA to 10 mA

TA = 25°C

1.0 ms/DIV

VO, 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

Figure 11. Output Saturation Voltage
versus Load Current	Figure 12. Output Waveform

(V)	0		Source Saturation		VCC = 15 V
VOLTAGE		VCC
	±2.0		(Load to Ground)		80 μs Pulsed Load
						120 Hz Rate
	±4.0		TA = 25°C
SATURATION
			TA = ±55°C
	±6.0
OUTPUT	4.0
	2.0	TA = ±55°C			Sink Saturation
			TA = 25°C	Gnd
,						(Load to VCC)
sat
V	0
		100	200		300	400
	0
		IO, OUTPUT LOAD CURRENT (mA)

	VCC = 15 V
	CL = 1.0 nF
90% ±	TA = 25°C

10% ±

100 ns/DIV

1
VOLTAGE		Figure 13. Output Cross Conduction Current				Figure 14. Supply Current versus Supply Voltage
					32				RT = 10 k
OUTPUT,			V/DIV10
	CURRENTSUPPLY			(mA)CURRENT					CT = 3.3 nF
V2;			mA/DIV
					24				VFB = 0 V
									Current Sense = 0 V
O1
		VCC = 15 V							TA = 25°C
VOLTAGEOUTPUT		CL = 15 pF			16
		TA = 25°C	V/DIV10
	I			I				±H Suffix
	CC		50	SUPPLY ,			±L Suffix
	,
				CC 8.0
,
O2					0	4.0	8.0	12	16	20
V		100 ns/DIV			0
							VCC, SUPPLY VOLTAGE (V)

MOTOROLA ANALOG IC DEVICE DATA	5