米6体育平台手机版

ZHCSIP1F April 1999 – July 2018 UCC2808A-1 , UCC2808A-2 , UCC3808A-1 , UCC3808A-2

PRODUCTION DATA.

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散热焊盘机械数据 (封装 | 引脚)

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6.5 Electrical Characteristics

T_A = 0°C to 70°C for the UCC3808A-x and –40°C to +85°C for the UCC2808A-x, VDD = 10 V⁽¹⁾, 1-µF capacitor from VDD to GND, R = 22 kΩ, C = 330 pF, and T_A = T_J (unless otherwise noted)

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
OSCILLATOR
	Oscillator frequency		175	194	213	kHz
	Oscillator amplitude/VDD⁽²⁾		0.44	0.5	0.56	V/V
ERROR AMPLIFIER
	Input voltage	COMP = 2 V	1.95	2	2.05	V
	Input bias current		–1		1	µA
	Open loop voltage gain		60	80		dB
	COMP sink current	FB = 2.2 V, COMP = 1 V	0.3	2.5		mA
	COMP source current	FB = 1.3 V, COMP = 3.5 V	–0.2	–0.5		mA
PWM
	Maximum duty cycle	Measured at OUTA or OUTB	48%	49%	50%
	Minimum duty cycle	COMP = 0 V			0%
CURRENT SENSE
	Gain⁽³⁾		1.9	2.2	2.5	V/V
	Maximum input signal	COMP = 5 V⁽⁴⁾	0.45	0.5	0.55	V
	CS to output delay	COMP = 3.5 V, CS from 0 mV to 600 mV		100	200	ns
	CS source current		–200			nA
	CS sink current	CS = 0.5 V, RC = 5.5 V⁽⁵⁾	5	10		mA
	Over current threshold		0.7	0.75	0.8	V
	COMP to CS offset	CS = 0 V	0.35	0.8	1.2	V
OUTPUT
	OUT low level	I = 100 mA		0.5	1	V
	OUT high level	I = –50 mA, VDD – OUT		0.5	1	V
	Rise time	C_L = 1 nF		25	60	ns
	Fall time	C_L = 1 nF		25	60	ns
UNDERVOLTAGE LOCKOUT
	Start threshold	UCCx808A-1⁽¹⁾	11.5	12.5	13.5	V
	Start threshold	UCCx808A-2	4.1	4.3	4.5	V
	Minimum operating voltage after start	UCCx808A-1	7.6	8.3	9	V
	Minimum operating voltage after start	UCCx808A-2	3.9	4.1	4.3	V
	Hysteresis	UCCx808A-1	3.5	4.2	5.1	V
	Hysteresis	UCCx808A-2	0.1	0.2	0.3	V
SOFT START
	COMP rise time	FB = 1.8 V, rise from 0.5 V to 4 V		3.5	20	ms
OVERALL
	Start-up current	VDD < start threshold		130	260	µA
	Operating supply current	FB = 0 V, CS = 0 V⁽¹⁾⁽⁶⁾		1	2	mA
	VDD zener shunt voltage	IDD = 10 mA⁽⁷⁾	13	14	15	V

(1) For UCCx808A-1, set VDD above the start threshold before setting at 10 V.

(2) Measured at RC. Signal amplitude tracks VDD.

(3) Gain is defined by: A = ΔV_COMP / ΔV_CS, 0 V ≤ V_CS ≤ 0.4 V.

(4) Parameter measured at trip point of latch with FB at 0 V.

(5) The internal current sink on the CS pin is designed to discharge an external filter capacitor. It is not intended to be a DC sink path.

(6) Does not include current in the external oscillator network.

(7) Start threshold and Zener shunt threshold track one another.