NTE7096
Integrated Circuit Current Mode Pulse Width Modulator (PWM) Control Circuit
8-PIN DIP

To order >>> NTE7097

Description:

The NTE7096 and NTE7097 are integrated circuits in 8-Lead DIP type packages that incorporate a new precision temperature-controlled oscillator with an internally trimmed discharge current to minimize variations in frequency. A precision duty-cycle clamp eliminates any need for an external oscillator when at, or near, a 50% duty-cycle condition. Duty-cycles greater than 50% are also possible. Special logic ensures that V_ref is stabilized before the output stage is enabled. Ion-implant resistors provide tighter control of under-voltage lockout.

Other features inclue low start-up current, pulse-by-current limiting, and high-current totem pole output for driving capacitive loads, such as the gate of a power MOSFET. The output is low in the off state, consistent with N-channel devices.

Features:

Optimized for Off-Line Control Internally Trimmed Temperature Compensated Oscillator Maximum Duty-Cycle Clamp Vref Stabilized Before Output Stage is Enabled Low Start-Up Current

Pulse-by-Pulse Current Limiting Improved U/V Lockout Double Pulse Suppression 1% Trimmed Bandgap Reference High Current Totem Pole Output

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Absolute Maximum Ratings:

Supply Voltage (ICC < 30mA)		Self Limiting
Supply Voltage (Low Impedence Source)		30V
Output Current		±1A
Output Energy (Capacitive Load)		5µJ
Analog Inputs (Pin2, Pin3)		-0.3V to VCC
Error Amp Output Sink Current		10mA

Electrical Characteristics: (0° </= T_A </= +70°C, V_CC = +15V, R_t = 680 Ohm, C_t = 0.022µF, Note 1 unless otherwise specified)

Parameter	Test Conditions	Min	Typ	Max	Unit
Reference Section
Output Voltage	TJ = +25°C, IO = 1mA	4.9	5.0	5.1	V
Line Regulation	12V </= VIN </= 25V	-	6	20	mV
Load Regulation	1mA </= IO </= 20mA	-	6	25	mV
Temperature Stability	Note 2	-	0.2	0.4	mV/°C
Total Output Variation	Line, Load, Temperature, Note 2	4.82	-	5.18	V
Output Noise Voltage	10Hz </= f </= 10kHz, TJ = +25°C, Note 2	-	50	-	µV
Long Term Stability	TA = +125°C, 1000Hrs., Note 2	-	5	25	mV
Output Short Circuit	TA = +25°C	-30	-100	-180	mA
Oscillator Section
Initial Accuracy	TJ = +25°C	47	52	57	kHz
Voltage Stability	12V </= VCC </= 25V	-	0.2	1.0	%
Temperature Stability	0° </= TA </= +70°C, Note 2	-	5	-	%
Amplitude	VPIN4 peak to peak	-	1.7	-	V
Discharge Current	TJ = +25°C	7.8	8.3	8.8	mA
	0° </= TA </= +70°C	7.6	-	9.0	mA
Error Amp Section
Input Voltage	VPIN1 = 2.5V	2.42	2.50	2.58	V
Input Bias Current		-	-0.3	-2.0	µA
AVOL	2V </= VO </= 4V	65	90	-	dB
Unity Gain Bandwidth	Note 2	0.7	1.0	-	MHz
PSRR	12V </= VCC </= 25V	60	70	-	dB
Output Sink Current	VPIN2 = 2.7V, VPIN1 = 1.1V	2	6	-	mA
Output Source Current	VPIN2 = 2.3V, VPIN1 = 5V	-0.5	-0.8	-	mA
VOUT High	VPIN2 = 2.3V, RL = 15k to GND	5	6	-	V
VOUT Low	VPIN2 = 2.7V, RL = 15k to Pin8	-	0.7	1.1	V
Current Sense Section
Gain	Note 3, Note 4	2.85	3.00	3.15	V/V
Maximum Input Signal	VPIN1 = 5V, Note 3	-	0.7	1.1	V
PSRR	12V </= VCC </= 25V, Note 3	-	70	-	dB
Input Bias Current		-	-2	-10	µA
Delay to Output	TJ = +25°C, Note 2	-	150	300	ns
Output Section
Output Low Level	ISINK = 20mA	-	0.1	0.4	V
	ISINK = 200mA	-	1.5	2.2	V
Output High Level	ISOURCE = 20mA	13.0	13.5	-	V
	ISOURCE = 200mA	12.0	13.5	-	V
Rise Time	TJ = +25°C, CL = 1nF, Note 2	-	50	150	ns
Fall Time	TJ = +25°C, CL = 1nF, Note 2	-	50	150	ns
Output Leakage	VCC = 14V, UVLO Active, VPIN6 = 0	-	-0.01	-10	µA
Total Standby Current
Start-Up Current		-	0.5	1.0	mA
Operating Supply Current	VPIN2 = VPIN3 = 0V, RT = 10k, CT = 3.3nF	-	11	17	mA
VCC Zener Voltage	ICC = 25mA	-	34	-	V
Under-Voltage Lockout Section
Start Threshold       NTE7096       NTE7097		14.5 7.8	16.0 8.4	17.5 9.0	V V
Minimum Operating Voltage       NTE7096       NTE7097	After Turn-On	8.5 7.0	10.0 7.9	11.5 8.2	V V

Note 1.	Adjust VCC above the start threshold before setting at 15V.
Note 2.	These parameters, although guaranteed, are not 100% tested in production.
Note 3.	Parameter measured at trip point of latch with VPIN2 = 0.
Note 4.	Gain defined as: A = VPIN1 / VPIN3; 0 </= VPin3 </= 0.8V.

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