TheJTM2204D is a high frequency, high efficiency DC to DC co(2)

六.产品PDF文档

七,功能概述
The boost converter is designed for output
voltage up to 14V with a switch peak current limit of
4.0 A. The device, which operates in a current
mode scheme with quasi-constant frequency, is
externally 1.2MHZ and the minimum input voltage is
1.6 V. To control the inrush current at start-up a soft-
start pin is available.
During the on-time, the voltage across the
inductor causes the current in it to rise. When the
current reaches a threshold value set by the internal
GM amplifier, the power transistor is turned off, the
energy stored into the inductor is then released and
the current flows through the Schottky diode
towards the output of the boost converter. The off-

The boost converter is designed for output
voltage up to 14V with a switch peak current limit of
4.0 A. The device, which operates in a current
mode scheme with quasi-constant frequency, is
externally 1.2MHZ and the minimum input voltage is
1.6 V. To control the inrush current at start-up a soft-
start pin is available.
During the on-time, the voltage across the
inductor causes the current in it to rise. When the
current reaches a threshold value set by the internal
GM amplifier, the power transistor is turned off, the
energy stored into the inductor is then released and
the current flows through the Schottky diode
towards the output of the boost converter. The off-

time is fixed for a certain Vin and Vs, and therefore
maintains the same frequency when varying these
parameters.
However, for different output loads, the
frequency may slightly change due to the voltage
drop across the Rdson of the power transistor
which will have an effect on the voltage across the
inductor and thus on Ton ( Toff remains fixed).
Some slight frequency changes might also appear
with a fixed output load due to the fact that the
output voltage Vs is not sensed directly but via the
SW Pin, which affects accuracy.
Because of the quasi-constant frequency
behavior of the device , the JTM2204D eliminates
the need for an internal oscillator and slope

八,相关产品

单P沟道低压MOS场效应管

型号	沟道	VDS	VGS	VTH	ID	IDM	RDS(on)	封装	状态	直接替代型号
		(Max)			(Max)		(Max)
JTM2301/A	P沟道	-20V	-10V	-0.7V	-3A	-10A	65mΩ	SOT23	量产	Si2301/AP2301/SI2305/XP152A/
								SOT23-3L		IRLML6401/IRML6402/AO3423
JTM2301B	P沟道	-20V	-12V	-0.7V	-2.8A	-10A	83mΩ	SOT23	量产	Si2301/AP2301/XP152A/
										IRLML6402/AO3423
JTM2301C	P沟道	-12V	-12V	-0.7V	-2.8A	-10A	85mΩ	SOT23	量产	Si2301/AP2301/XP152A/
										IRLML6402/AO3423
JTM2305	P沟道	-20V	-12V	-0.7V	-4.1A	-15A	39mΩ	SOT23	量产	Si2305/AP2305/APM2305/
										IRLML6401/IRML6402/AO3423
JTM2333	P沟道	-12V	-12V	0.32V	6A	20A	30mΩ	SOT23-3L	量产	Si2333/IRLML6302
JTM2341/B	P沟道	-30V	-20V	-1V	-4.2A	-30A	50mΩ	SOT23-3L	量产	WPM2341/Si2341/AO3401
								SOT23		AO3415/IRLML6401/SI2307
JTM3401/B	P沟道	-30V	-20V	-1V	-4.2A	-30A	50mΩ	SOT23-3L	量产	AO3401/AO3415/IRLML6401
								SOT23		/IRLML6402/SI2307
JTM3401C	P沟道	-30V	-20V	-1.6V	-2.5A	-10A	72mΩ	SOT23	量产	AO3401/AO3407/AO3415/
										IRLML6401/IRLML6402/SI2307
JTM3407/B	P沟道	-30V	-20V	-1.5V	-4.2A	-20A	55mΩ	SOT23-3L	量产	AO3407/AO3415/IRLML6401
								SOT23		IRLML6402/SI2307
JTM3413/B	P沟道	-20V	-12V	-0.7V	-2.5A	-10A	118mΩ	SOT23-3L	量产	AO3413
								SOT23
JTM3415E	P沟道	-20V	-10V	-0.65V	-4.0A	-30A	34mΩ	SOT23-3L	量产	AO3415
	带ESD保护
JTM3421/B	P沟道	-30V	-20V	-1V	-4.2A	-30A	50mΩ	SOT23-3L	量产	AO3421/AO3401/AO3415
								SOT23		WPM2341/IRLML6401/SI2307
JTM2319	P沟道	-40V	-20V	-1.5V	-5.3A	-20A	73mΩ	SOT-23-3L	量产	Si2319
JTM2309	P沟道	-60V	-20V	-1.0V	-1.8A	-7A	170mΩ	SOT-23-3L	量产	Si2309
JTM6401	P沟道	-30V	-20V	-1V	-5.0A	-30A	50mΩ	SOT23-6L	量产	AO6401/Si3481/APM2605/AO6405
										Si3455/SI3457/FDC634P/FDC636P
JTM9435	P沟道	-30V	-20V	-1.6V	-5.1A	-20A	48mΩ	SOP8	量产	CEM9435/APM9435/AP9435/
										Si9435/FDS9435/AO4405
JTM9435B	P沟道	-20V	-10V	-0.7V	-5A	-20A	60mΩ	SOP8	量产	CEM9435/APM9435/AP9435/
										Si9435/FDS9435/AO4405
JTM4435	P沟道	-30V	-20V	-1.5V	-9.1A	-50A	15mΩ	SOP8	量产	AO4435/CEM4435/APM4435/
										AP4435/Si4435/FDS4435
JTM4407	P沟道	-30V	-20V	-1.65V	-12A	-60A	14mΩ	SOP8	量产	AO4407/CEM4407/APM4407/
										AP4407/Si4407/FDS4407
JTM4409	P沟道	-30V	-20V	-1.75V	-15A	-80A	8mΩ	SOP8	量产	AO4409/AO4407/AO4435/CEM4435
										APM4435/AP4435/Si4435/FDS4435
JTM4443	P沟道	-40V	-20V	-1.5V	-6A	-24A	73mΩ	SOP8	量产	AO4443
										IRF7241
JTM4485	P沟道	-40V	-20V	-2.0V	-15A	-60A	30mΩ	SOP8	量产	AO4485
										IRF7240
JTM4441	P沟道	-55V	-20V	-2.6V	-5A	-25A	64mΩ	SOP8	量产	AO4441/AO4421/
										AO4443
JTM5853	P沟道+肖特基	22V	8V	0.69V	3A	12A	110mΩ	DFN2*3-8	量产	Si5853/AON4703/NHPD4P02
JTM16P12D	P沟道	12V	12V	0.7V	16A	65A	18mΩ	DNF2*2-6	量产	AON2701/AON2401/3/5/IRLHS2242

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