米6体育平台手机版

ZHCSVP7J January 1989 – October 2024 TL2842 , TL2843 , TL2844 , TL2845 , TL3842 , TL3843 , TL3844 , TL3845

PRODUCTION DATA

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请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)

D|14
D|8
P|8

散热焊盘机械数据 (封装 | 引脚)

订购信息

5.5 Electrical Characteristics

over operating free-air temperature range, V_CC = 15 V⁽¹⁾, R_T = 10 kΩ, C_T = 3.3 nF (unless otherwise noted)

PARAMETER			TEST CONDITIONS⁽²⁾	TL284x			TL384x			UNIT
PARAMETER			TEST CONDITIONS⁽²⁾	MIN	TYP⁽²⁾	MAX	MIN	TYP⁽²⁾	MAX	UNIT
Reference Section
	Output voltage		I_O = 1 mA, T_A = 25°C	4.95	5	5.05	4.9	5	5.1	V
	Line regulation		V_CC = 12 V to 25 V		6	20		6	20	mV
	Load regulation		I_O = 1 mA to 20 mA		6	25		6	25	mV
	Temperature coefficient of output voltage				0.2	0.4		0.2	0.4	mV/°C
	Output voltage with worst-case variation		V_CC = 12 V to 25 V, I_O = 1 mA to 20 mA	4.9		5.1	4.82		5.18	V
	Output noise voltage		f = 10 Hz to 10 kHz, T_A = 25°C		50			50		µV
	Output-voltage long-term drift		After 1000 h at T_A = 25°C		5	25		5	25	mV
	Short-circuit output current			–30	–100	–180	–30	–100	–180	mA
Oscillator Section
	Oscillator frequency⁽³⁾		T_A = 25°C	47	52	57	47	52	57	kHz
	Frequency change with supply voltage		V_CC = 12 V to 25 V		2	10		2	10	Hz/kHz
	Frequency change with temperature				50			50		Hz/kHz
	peak-to-peak amplitude at RT/CT				1.7			1.7		V
Error-Amplifier Section
	Feedback input voltage		COMP at 2.5 V	2.45	2.50	2.55	2.42	2.50	2.58	V
	Input bias current				–0.3	–1		–0.3	–2	µA
	Open-loop voltage amplification		V_O = 2 V to 4 V	65	90		65	90		dB
	Gain-bandwidth product			0.7	1		0.7	1		MHz
	Supply-voltage rejection ratio		V_CC = 12 V to 25 V	60	70		60	70		dB
	Output sink current		VFB, at 2.7 V, COMP at 1.1 V	2	6		2	6		mA
	Output source current		VFB, at 2.3 V, COMP at 5 V	–0.5	–0.8		–0.5	–0.8		mA
	Hihg-level output voltage		VFB, at 2.3 V, R_L = 15 kΩ to GND	5	6		5	6		V
	Low-level output voltage		VFB, at 2.7 V, R_L = 15 kΩ to GND		0.7	1.1		0.7	1.1	V
Current-sense Section
	Voltage amplification		See⁽⁴⁾⁽⁵⁾	2.85	3	3.13	2.85	3	3.15	V/V
	Current-sense comparator threshold		COMP at 5 V, see⁽⁴⁾	0.9	1	1.1	0.9	1	1.1	V
	Supply-voltage rejection ratio		V_CC = 12 V to 25 V, see⁽⁴⁾		70			70		dB
	Input bias current				–2	–10		–2	–10	µA
	Delay time to output				150	300		150	300	ns
Output Section
	High-level output voltage		I_OH = –20 mA	13	13.5		13	13.5		V
	High-level output voltage		I_OH = –200 mA	12	13.5		13	13.5		V
	Low-level output voltage		I_OH = 20 mA		0.1	0.4		0.1	0.4	V
	Low-level output voltage		I_OH = 200 mA		1.5	2.2		1.5	2.2	V
	Rise time		C_L = 1 nF, T_A = 25°C		25	150		25	150	ns
	fall time		C_L = 1 nF, T_A = 25°C		25	150		25	150	ns
Undervoltage-Lockout Section
	Start threshold voltage	TLx842, TLx844		15	16	17	14.5	16	17.5	V
	Start threshold voltage	TLx843, TLx845		7.8	8.4	9	7.8	8.4	9	V
	Minimum operating voltage after startup	TLx842, TLx844		9	10	11	8.5	10	11.5	V
	Minimum operating voltage after startup	TLx843, TLx845		7	7.6	8.2	7	7.6	8.02	V
Pulse-Width-Modulator Section
	Maximum duty cycle	TLx842, TLx843		92%	97%	100%	92%	97%	100%
	Maximum duty cycle	TLx844, TLx845		46%	48%	50%	46%	48%	50%
	Minimum duty cycle					0%			0%
Supply Voltage
	Start-up current				0.5	1		0.5	1	mA
	Operating supply current		VFB and ISENSE at 0 V		11	17		11	17	mA
	Limiting voltage		I_CC = 25 mA		39			39		V

(1) Adjust V_CC above the start threshold before setting it to 15 V.

(2) All typical values are at TA = 25°C.

(3) Output frequency equals oscillator frequency for the TLx842 and TLx843. Output frequency is one-half the oscillator frequency for the TLx844 and TLx845.

(4) These parameters are measured at the trip point of the latch, with VFB at 0 V.

(5) Voltage amplification is measured between ISENSE and COMP, with the input changing from 0 V to 0.8 V.