nx2155h Microsemi Corporation, nx2155h Datasheet
nx2155h
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nx2155h Summary of contents
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... RT 8 COMP GND(PAD) Device Temperature NX2155HCUPTR Note: XXX is date code. For example, 841 means that this NX2155H is packaged in the 41th week of 2008 Rev.1.1 04/16/09 n Single supply voltage from 8V to 22V n Internal 5V regulator n Programmable operational frequency of 2MHz n Internal Digital Soft Start Function ...
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... OCP FB COMP RT SYM Test Condition V REF V =8V to 22V in 5V REG rising V =9V to 22V switching Switching with HDRV and LDRV open @2.2MHz NX2155H = Followings are bypass Low duty cycle A Min TYP MAX Units 0.8 V 0.784 0.816 0 4.75 5 ...
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... I=200mA sink THdrv(Rise) THdrv(Fall) Tdead(L to Ldrv going Low to Hdrv H) going High, 10%-10% R (Ldrv) I=200mA source R (Ldrv) I=200mA sink TLdrv(Rise) TLdrv(Fall) Tdead going Low to Ldrv L) going High, 10% to 10% forward current=20mA NX2155H Min TYP MAX Units 6 7.5 0.6 V 400 uS 2250 kHz 1.5 V 1.4 1 ...
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... This pin is connected to the source of the high side MOSFET and provides return 1 SW path for the high side driver. High side MOSFET gate driver. 2 HDRV Ground pin. PAD GND Low side MOSFET gate driver. 4 LDRV Oscillator's frequency can be set by using an external resistor from this pin GND. Rev.1.1 04/16/09 PIN DESCRIPTION NX2155H 4 ...
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... BLOCK DIAGRAM 5V VIN Regulator 5VREG 1.25V Bias Generator COMP 0.3V RT START 0.8V Digital ramp start Up FB COMP START GND Figure 2 - Simplified block diagram of the NX2155H Rev.1.1 04/16/09 UVLO 0.8V UVLO POR START OC OVP OSC Thermal S Q Shutdown R Hiccup Logic 0.6V CLAMP 1.3V CLAMP START NX2155H BST HDRV ...
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... R8 4.7u 2 HDRV OCP R1 6k 4.22k 4 LDRV 15k COMP * R7 and C7 are optional. Figure 3 - Simplified demoboard schematic of NX2155H Rev.1.1 04/16/09 sdfd CIN2 CIN1 10uF,16V 0.1uF M1B AO6800 HDRV BRL3225T1R0M COUT1 R7 10uF,16V 10 M1A AO6800 LDRV 1 C7 470p GND C6 ...
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... Rev.1.1 04/16/09 Reference Part 0.1u 4.7uF,6.3V,X5R 180p 1n 10p 470p 10uF,16V,X5R 10uF,10V,X5R BRL3225T1R0M AO6800 4.22k 6k 300 49.9k 9.53k 15k 10 0 NX2155H/MSOP-EP10 NEXSEM INC. NX2155H Manufacturer TAIYO YUDEN AOS 7 ...
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... SW 10V/DIV, CH4 OUTPUT CURRENT 2A/DIV) Fig.6 OCP protection during output short(CH1 VOUT 2V/DIV, CH4 OUTPUT CURRENT 5A/DIV) 100.00% 90.00% 80.00% 70.00% 60.00% 50.00% 40.00% 30.00% 20.00% 10.00% 0.00% 0 500 1000 1500 Iout (mA) Fig.8 Output efficiency Rev.1.1 04/16/09 Fig.5 Startup( CH1 VOUT 2V/DIV) Fig.7 Output dynamic response(CH1 VOUT AC 200mV/DIV, CH4 OUTPUT CURRENT 500mA/DIV) 2000 2500 NX2155H 8 ...
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... Demoboard Layout Rev.1.1 04/16/09 Figure 9 Top layer Figure 10 Ground layer NX2155H 9 ...
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... Rev.1.1 04/16/09 Figure 11 Power layer Figure 12 Bottom layer NX2155H 10 ...
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... C4 0. HDRV 30k R1 10 OCP 3k 4 LDRV 30k C22 33p C21 1n 8 COMP Figure 13 - Simplified demoboard schematic of NX2155H Rev.1.1 04/16/09 BUS C18 100u/16v C9 C10 22u/25V 22u/25V M1 HDRV DO5010H-222MLD M2 R17 LDRV 4 2.15 C13 1000p R9 100k R8 C23 R10 19 ...
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... C22 9 1 C23 R3, R10 18 1 R17 Rev.1.1 04/16/09 Part Manufacturer 0.1u 4.7u 22u/25V/X5R 1000p 47uF/6.3V/X5R 100u/16v 1n 33p 220p DO5010H-222MLD COILCRAFT BSC119N03S INFINEON BSC029N025S INFINEON 3k 30k 750 100k 19.1k 2.15 NX2155/MSOP-EP10 NEXSEM INC. NX2155H 12 ...
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... CH4 INDUCTOR CURRENT 5A/DIV) Fig.16 OCP protection during output short(CH2 VOUT 2V/DIV, CH4 OUTPUT CURRENT 5A/DIV) Fig.18 Output efficiency Rev.1.1 04/16/09 Fig.15 Startup( CH1 VOUT 2V/DIV, CH4 INDUCTOR CURRENT 5A/DIV) Fig.17 Output dynamic response(CH2 VOUT AC 200mV/DIV, CH4 OUTPUT CURRENT 5A/DIV) NX2155H 13 ...
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... RIPPLE ...( OUT where F the compensator. Their locations are shown in figure 20. The transfer function of type III compensator for transconductance amplifier is given by OUT NX2155H o phase shift , o and the gain crossing 0dB with - 1 ...( ...( ...
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... Gain For this type of compensator <F <<F LC ESR Ve power stage loop gain F ESR Figure 21 - Bode plot of Type II compensator NX2155H ... ( ... ( ... ( ...
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... The frequency can be set by external Rt resistor. and R selection The relationship between frequency and RT pin is shown as follows. 2500 2000 1500 1000 500 0 3 Figure 25 - Frequency versus Rt resistor NX2155H R DSON +V OCP SW vbus I OCP OCP SW R OCP R OCP DSON NX2155H Frequency Rt(kohm ...
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... MSOP 10 PIN WITH EXPOSED PAD OUTLINE DIMENSIONS NOTE: ALL DIMENSIONS ARE DISPLAYED IN INCHES. Rev.1.1 04/16/09 NX2155H 17 ...