L6740L STMicroelectronics, L6740L Datasheet - Page 29

• Manufacturer Part Number: L6740L
• Description: IC HYBRID CONTROLLERS 48TQFP
• Manufacturer: STMicroelectronics

Specifications of L6740L

• Applications: Hybrid Controllers
• Voltage - Supply: 9 V ~ 15 V
• Current - Supply: 20mA
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Number Of Outputs: 2
• Output Current: 170 A
• Input Voltage: 13.2 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Hybrid Controller: compatible with PVI and SVI CPUs
• Dual Controller: 2 to 4 scalable phases for CPU CORE, 1 phase for NB
• Dual Over-current Protection: Average and per-phase
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L6740L
Figure 11. PVI mode - on-the-fly VID transitions
●
●
OV, UV and PWRGOOD are masked during the transition and re-activated with a 16 clock
cycle delay after the end of the transition to prevent from false triggering.
OTFVID Clock
Int. Reference
VID [0:5]
re-starts monitoring VID after the transition has finished on the next rising-edge
available. OTFVID-clock frequency (F
If the new VID code is more than 1 LSB different from the previous, the device will
execute the transition stepping the reference with the OTFVID-clock frequency F
until the new code has reached. The output voltage rate of change will be of 12.5 mV /
4 μsec. = 3.125 mV/μsec.
SVI mode.
As soon as the controller receives a new valid command to set the VID level for one (or
both) of the two sections, the reference of the involved section steps up or down
according to the target-VID with a 3 mV/μsec. slope (Typ). until the new VID code is
reached.
If a new valid command is issued during the transition, the device updates the target-
VID level and performs the on-the-fly Transition up to the new code.Pre-PWROK Metal
VID
OTF-VID are not managed in this case because the Pre-PWROK Metal VID are stored
after EN is asserted.
V_FIX mode.
L6740L checks for SVC/SVD modifications and, once the new code is stable, it steps
the reference of both sections up or down according to the target-VID with a
3 mV/μsec. slope (Typ). until the new VID code is reached.
V out
T
OTFVID
Vout Slope Controlled by internal
T sw
OTFVID-Clock Oscillator
x 4 Step VID Transition
OTFVID
T
VID
) is 500 kHz.
Vout Slope Controlled by external
4 x 1 Step VID Transition
driving circuit (T
Output voltage positioning
VID
)
OTFVID
29/44
t
t
t
t