Customization: | Available |
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Conductive Type: | Bipolar Integrated Circuit |
Integration: | GSI |
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Pin | Description |
VOUT1 (A1,A2,A3), VOUT2 (C1,D1,D2), VOUT3 (F1,G1,G2), VOUT4 (J1,K1,K2), | Power Module Quad Output Pins |
VIN1 (B3,B4),VIN2 (E3,E4),VIN3 (H3,H4),VIN4 (L3,L4) | Power Module Quad Input Pins |
GND (A4,A5, B1,B2, C5, D3,D4,D5, E1,E2, F5, G3,G4,G5,) h1, h2, j5, k3, k4, l1, l2) |
ground pin |
fb1 (a7), fb2 (d7), fb3 (g7), fb4 (j7) | Four output voltage adjustment pins to which 0.5% accuracy regulator resistors can be connected to GND. |
run1 (c6), run2 (f6), run3 (j6), run4 (k7) | Four-way enable pin, can be directly connected to the input voltage, can also be connected to an external power supply to control the power module, the minimum enable starting voltage of 1.1V, when the enable voltage is lower than 0.95V, the power supply shutdown. It is recommended that this pin should not be left idle when the enable voltage is greater than 1.2V. |
pgood1 (c3), pgood2 (c2), pgood3 (f2), pgood4 (j2) |
Fault indication pin, PG=high means VOUT is within the voltage range, PG=low means VOUT is below the specified value. This PGOOD pin can be connected to a 100K resistor to the VO pin, can also be connected to other voltage supply to the PGOOD, when the PGOOD is set to low means that the power module is abnormal (the abnormalities include UV, OV, OC, OT, etc.) If you do not need to indicate the function of the fault, do not add this resistor, PGOOD can be left empty. |
VO1 (C4), VO2 (F4), VO3 (J4), VO4 (K5) | VO can be used as PG power supply pin, four sets of VO have been connected to four outputs inside the power module respectively, i.e. VO1=VOUT1,VO2=VOUT2, VO3=VOUT3, VO4=VOUT4. |
MODE1(B6), MODE2(E6), MODE3(H6), MODE4(L6) | The FHT4644L is a vacant pin with no electrical function, and can be connected to any pin. (The FHT4644L's operating frequency and mode can be automatically adjusted to a typical operating frequency of 1MHz.) |
SGND (F7) | For signal ground, it is recommended that GND (power ground) and SGND be wired separately and eventually connected with a 0 ohm resistor. |
SS1 (A6), SS2 (D6), SS3 (G6), SS4 (K6) | External soft start pin, external 3.3nF ceramic capacitor can be connected to signal ground, if there is no need to increase the external soft start function, this capacitor can not be added, SS pin is empty. |
NC (E7, H7, L7, C7, L5, H5, E5, B5, J3, F3) | Empty pin, no electrical function, can be connected to any pin. |
Absolute Maximum Ratings | Condition | Minimum value | Nominal value | Maximum value | Unit |
VIN (each way) | -0.3 | 17 | V | ||
FB, VOUT (each way) | -0.3 | 7 | V | ||
PGOOD (each way) | -0.3 | 12 | V | ||
PGOOD current (each way) | 10 | mA | |||
VO, SS/TR (each way) | -0.3 | 7 | V | ||
RUN (each way) | -0.3 | 17 | V | ||
Storage temperature | -55 | 150 | ºC | ||
Reflow temperature | 245 | ºC | |||
Input Characteristics | Condition | Minimum value | Nominal value | Maximum value | Unit |
Input Voltage Range | 4.0 | 12 | 14 | V | |
Power-on voltage threshold | 3.95 | V | |||
Shutdown Voltage Threshold | 3.5 | 3.6 | 3.9 | V | |
Input current at full load | VIN =12V, VOUT =1.5V, IOUT =4A | 0.6 | A | ||
Input current at low voltage full load | VIN =5V, VOUT =1.5V, IOUT =4A | 1.5 | A | ||
Input current at no load | VIN =12V, VOUT =1.5V, IOUT =0A | 650 | μA | ||
Static Input Current | ON/OFF=OFF | 15 | μA | ||
General Requirements | Condition | Minimum Value | Nominal Value | Maximum Value | Unit |
Switching Frequency | Automatic Adjustment | 1000 | KHz | ||
Efficiency | Vin=5V , Vout=3.3V | 92 | % | ||
Soft Start Time | SS pin with 3.3nF ceramic capacitor | 2 | ms | ||
Enable | Condition | Minimum value | Nominal value | Maximum value | Unit |
RUN enable voltage | 1.2 | - | 14 | V | |
Output Characteristics | Condition | Minimum value | Nominal value | Maximum value | Unit |
Output Voltage Range | Adjusted by FB pin resistor | 0.8 | 5.5 | V | |
Output Voltage | CIN = 22µF, COUT = 22uF×4, VIN = 4V to 15V, IOUT = 0A to 4A | 1.47 |
1.5 |
1.53 |
V |
Linear Regulation | VOUT = 1.5V , 4V < VIN < 15V , ILOAD = 4A | ±0.5 | % | ||
Load Regulation | VIN =12V , VOUT =1.5V,1A < ILOAD ≤ 4A | ±1 | % | ||
Ripple and Noise | VIN =12V , VOUT =1.5V , IOUT =4A, Cout =22uF×4 , 20MHz bandwidth | 10 |
50 |
mV |
|
Dynamic Load Response | 75-100% full load, di/dt = 1A/μS Cout =22uF×4 | 50, 40 | mV , µs |
Output Characteristics | Condition | Minimum value | Nominal value | Maximum value | Unit |
Output Overcurrent Protection | Iout% | 115 | 120 | 125 | % |
Output Overvoltage Protection | Vout% | 115 | 115 | 130 | % |
Over-Temperature Protection | Case temperature (Tc) | - | - | 135 | ºC |
Structural Characteristics | Conditions | Minimum Value | Nominal value | Maximum value | Unit |
Packaging | LGA, BGA | - | - | - | - |
Size | lga: 9*15*1.82; bga: 9*15*2.42 | - | - | - | mm |
Weights | 1.6 | g | |||
Environmental Adaptability | Condition | Minimum value | Nominal value | Maximum value | Unit |
Operating temperature (Case temperature) | -55 | 125 | ºC | ||
High temperature storage (ambient temperature) | +125°C, 48h | 125 | ºC | ||
High temperature operation (ambient temperature) | +85°C, 24h; Input low voltage, standard voltage, load derating, high voltage each 8h |
85 | ºC | ||
Low temperature storage (ambient temperature) | -55°C, 24h | -55 | ºC | ||
Low temperature operation (ambient temperature) | -55°C, 24h; Input low pressure, standard pressure, high pressure each 8h |
-55 | ºC | ||
Damp heat | High temperature/high humidity stage: 60ºC, 95%; Low temperature/high humidity stage: 30ºC, 95%; 10 cycles of 24h each. | 30 | 60 | ºC | |
Thermal shock | High temperature 125 ºC, low temperature -55 ºC, high and low temperature for an hour for a cycle, a total of 32 test cycles | -55 | 125 | ºC |
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