ISL6112 データシートの表示（PDF） - Renesas Electronics
部品番号
コンポーネント説明
一致するリスト
ISL6112 Datasheet PDF : 30 Pages
| |||
ISL6112
Pin Configuration
ISL6112
(48 LD 7X7 QFN)
TOP VIEW
48 47 46 45 44 43 42 41 40 39 38 37
FAULTA 1
CFILTERA 2
12VGATEA 3
GPI_A0 4
12VINA 5
PWRGDA 6
NC 7
12VSENSEA 8
FORCE_ONA 9
GND
(EXPOSED BOTTOM PAD)
36 FAULTB
35 CFILTERB
34 12VGATEB
33 GND
32 12VINB
31 PWRGDB
30 NC
29 12VSENSEB
28 FORCE_ONB
12VOUTA 10
VSTBYA 11
3VINA 12
27 12VOUTB
26 VSTBYB
25 3VINB
13 14 15 16 17 18 19 20 21 22 23 24
Pin Descriptions
PIN NUMBER
5, 32
12, 25
16, 21
10, 27
8, 29
13, 24
3, 34
PIN NAME
PIN FUNCTION
12VINA, 12VINB
Provides 12VMAIN power supply and the high side of the sense resistor inputs. This must be a Kelvin
connection between IC and sense resistor. An undervoltage lockout circuit (UVLO) prevents the switches from
turning on while this input is less than its lockout threshold.
3VINA, 3VINB
Provides 3.3VMAIN power supply and the high side of the sense resistor inputs. This must be a Kelvin
connection between IC and sense resistor. An undervoltage lockout circuit (UVLO) prevents the switches from
turning on while this input is less than its lockout threshold.
3VOUTA, 3VOUTB 3.3VOUT. Connected to 3.3V FET source. These are used to monitor the 3.3V output voltages for Power-Good
status.
12VOUTA, 12VOUTB 12VOUT. Connected to 12V FET drain. These are used to monitor the 3.3V output voltages for Power-Good
status.
12VSENSEA,
12VSENSEB
12VMAIN low side of sense resistor connection. When either current limit threshold of the load current across
the sense resistor = 50mV is reached, the related 12VGATE pin is modulated to maintain a constant voltage
across the sense resistor and thus a constant current into the load. If the 50mV threshold is exceeded for tFLT,
the isolation protection is tripped, and the GATE pin for the affected supply’s external MOSFET is immediately
pulled high. This must be a Kelvin connection between IC and sense resistor.
3VSENSEA,
3VSENSEB
3.3VMAIN low side of sense resistor connection. When either current limit threshold of the load current across
the sense resistor = 50mV is reached, the related 3V GATE pin is modulated to maintain a constant voltage
across the sense resistor and thus a constant current into the load. If the 50mV threshold is exceeded for tFLT,
the isolation protection is tripped, and the GATE pin for the affected supply’s external MOSFET is immediately
pulled low. This must be a Kelvin connection between IC and sense resistor.
12VGATEA
12VGATEB
12V gate drive outputs. Each pin connects to the gate of an external P-Channel MOSFET. During power-up, the
CGATE and the CGS of the MOSFETs are connected to a 25µA current sink. This controls the value of dv/dt
seen at the source of the MOSFETs. During current limit events, the voltage at this pin is adjusted to maintain
constant current through the switch for a period of tFLT. Whenever an overcurrent, thermal shutdown, or input
undervoltage fault condition occurs, the GATE pin for the affected slot is immediately brought high. These pins
are charged by an internal current source during power-down.
FN6456 Rev 1.00
August 25, 2011
Page 4 of 30
Share Link: 